https://www.foundinitaly.com/blogs/travel/isola-di-loreto-a-real-life-fairytale-island

This island is private property.

There is a spectacular little island in the Iseo Lake, in the province of Brescia. The structures on it are built in a neo-Gothic style— meaning the main property is pretty much a fairy tale castle. The island has its own small harbour, two magnificent towers and a park of conifers that introduce the sweet scent of pine into the air.

In the XIX century, the island became a property of Duchess Felicita Bevilacqua La Masa, the nit was purchased by Vincenzo Richeri, a Royal Navy Captain. In 1910, Richeri built a neo-Gothic castle on the island, and around it he created a garden full of conifers, a marina, and two light towers. The latter illuminate a cove with a path leading straight up to the villa.

This abode features a rectangular layout, with two floors. Thanks to its turret, battlements, and light stone walls, the villa appears quite spectacular and evocative. It actually stands on a rock overlooking the lake.

https://www.alcazardesegovia.com/

https://www.openstreetmap.org/relation/6708094 Street view: https://goo.gl/maps/NvH3Jcj7cFCA5rv47

Visitation info is on their website, but it’s only in Spanish.

The Alcázar of Segovia, like many fortifications in Spain, started off as a Roman castrum, but apart from the foundations, little of the original structure remains. The alcázar was built by the Berber Almoravid dynasty. Almoravid art and architecture is scarcely talked about in scholarship in part because so little of the physical work has survived in Spain. Furthermore, the Almoravid dynasty was short-lived and therefore much of the art and architecture of that period was subsequently destroyed or converted by their successors.

The first reference to this castle was in 1120, around 32 years after the city of Segovia was conquered by the Christians (during the Reconquista when King Alfonso VI reconquered lands to the south of the Duero river, down to Toledo and beyond). In 1258, during the reign of King Alfonso X of Castile (r. 1252–1284), an intense thunderstorm caused a fire that destroyed several rooms, leading to centuries-long reconstruction during the reigns of various kings.

It is not known what the shape and form of the Alcázar was before the reign of King Alfonso VIII (1155–1214), however early documentation mentioned a wooden stockade fence. It can be concluded that prior to Alfonso VIII's reign, the Muslim era structure was no more than a wooden fort built over the old Roman foundations. Alfonso VIII and his wife, Eleanor of England (sister of Richard the Lionheart), made this alcázar their principal residence and much work was carried out to erect the beginnings of the stone fortification we see today.

The Alcázar of Segovia was one of the favorite royal residences starting in the 13th century that in turn, led to secular patronage to the city of Segovia. It was during this period that most of the current building was constructed by the House of Trastámara.

In 1258, parts of the Alcázar had to be rebuilt by King Alfonso X after a cave-in and the Hall of Kings was built to house Parliament soon after. However, the single largest contributor to the continuing construction of the Alcázar was King John II of Castile who built the "New Tower" (John II tower as it is known today).

In 1474, the Alcázar played a major role in the rise of Queen Isabella I. On 12 December news of King Henry IV's death in Madrid reached Segovia and Isabella immediately took refuge within the walls of the Alcázar where she received the support of Andres Cabrera and Segovia's council. She was enthroned the next day as Queen of Castile and León.

The next major renovation at the Alcázar was conducted by King Philip II after his marriage to Anna of Austria. He added the sharp slate spires to reflect the castles of central Europe. In 1587, architect Francisco de Morar completed the main garden and the School of Honor areas of the castle.

https://georgia.travel/cities-towns/akhaltsikhe

https://www.openstreetmap.org/relation/9448437 Street view: https://goo.gl/maps/VTE56SYxSVQK7Y4C9

Akhaltsikhe (Rabati) Castle is a medieval fortress built in the 9th century under the name "Lomsia Castle" in the city of Akhaltsikhe in southern Georgia, recently globally reconstructed. One of the main attractions of the Samtskhe-Javakheti region along with Vardzia. The original name of the fortress in the 9th century was Lomsia, which can be translated from Georgian as "Lion". At the end of the 12th century, Lomsia acquired the new name Akhal-tsikhe, which literally translates as “New fortress”,the name "Rabati" which is sometimes used for this castle, mostly is used after restoration and it is a of Jewish/Arabic origin and means any fortified place. Rabati was usually called the trading quarter at the fortress, earlier mainly Jewish merchants and craftsmen lived in the Rabat quarter, however mainly after reconstruction the name stuck to the all fortress itself. On the official web site of municipality of Akhaltsikhe town and on the official Facebook page of the fortress the name is "Akhaltsikhe (Rabati) Castle" was used or just "Akhaltsikhe Castle." In most of all historical documents castle is mentioned as Akhaltsikhe castle.

https://www.openstreetmap.org/way/188997799 Street view: https://goo.gl/maps/t4juVdH17RkXP75K7

https://www.fincaderequesens.cat/castell-de-requesens/ (thanks to @synthetic_being@lemmy.cat for finding this)

Probably existing since the 9th century, the castle is mentioned for the first time in a document from Ponce I, count of Ampurias in the 11th century.

In the 19th century, the ruined castle was rebuilt in a neo-medieval style. The castle was extensively used after the Spanish Civil War (1936–1939), when some modern constructions were added to the original structure.

https://www.wartburg.de

https://www.openstreetmap.org/node/2272817622 Street view: https://goo.gl/maps/VhY5HLaX9Dae7KqM9

The website states that the castle is open every day of the year. 12 euros for entry.

The castle's foundation was laid about 1067 by the Thuringian count of Schauenburg, Louis the Springer ( Ludwig der Springer ), a relative of the Counts of Rieneck in Franconia. Together with its larger sister castle Neuenburg in the present-day town of Freyburg, the Wartburg secured the extreme borders of his traditional territories. Louis the Springer is said to have had clay from his lands transported to the top of the hill, which was not quite within his lands, so he might swear that the castle was built on his soil.

The castle was first mentioned in a written document in 1080 by Bruno, Bishop of Merseburg, in his De Bello Saxonico ("The Saxon War") as Wartberg.

During the Investiture Controversy, Louis's henchmen attacked a military contingent of King Henry IV of Germany. The count remained a fierce opponent of the Salian rulers, and upon the extinction of the line, his son Louis I was elevated to the rank of a Landgrave in Thuringia by the new German king Lothair of Supplinburg in 1131.

From 1172 to 1211, the Wartburg was one of the most important princes' courts in the German Reich. Hermann I supported poets like Walther von der Vogelweide and Wolfram von Eschenbach who wrote part of his Parzival here in 1203.

The castle thus became the setting for the legendary Sängerkrieg, or Minstrels' Contest in which such Minnesänger as Walther von der Vogelweide, Wolfram von Eschenbach, Albrecht von Halberstadt (the translator of Ovid) and many others supposedly took part in 1206/1207. The legend of this event was later used by Richard Wagner in his opera Tannhäuser.

At the age of four, St. Elisabeth of Hungary was sent by her mother to the Wartburg to be raised to become consort of Landgrave Ludwig IV of Thuringia. From 1211 to 1228, she lived in the castle and was renowned for her charitable work. In 1221, Elisabeth married Ludwig. In 1227, Ludwig died on the Crusade and she followed her confessor Father Konrad to Marburg. Elisabeth died there in 1231 at the age of 24 and was canonized as a saint of the Roman Catholic Church just five years after her death.

In 1247, Heinrich Raspe, the last landgrave of Thuringia of his line and an anti-king of Germany, died at the Wartburg. He was succeeded by Henry III, Margrave of Meissen.

In 1320, substantial reconstruction work was done after the castle had been damaged in a fire caused by lightning in 1317 or 1318. A chapel was added to the Palas.

The Wartburg remained the seat of the Thuringian landgraves until 1440. The Luther Room

From May 1521 to March 1522, Martin Luther stayed at the castle under the name of Junker Jörg (the Knight George), after he had been taken there for his safety at the request of Frederick the Wise following his excommunication by Pope Leo X and his refusal to recant at the Diet of Worms. It was during this period that Luther translated the New Testament from ancient Greek into German in just ten weeks. Luther's was not the first German translation of the Bible but it quickly became the most well known and most widely circulated.

From 1540 until his death in 1548, Fritz Erbe, an Anabaptist farmer from Herda, was held captive in the dungeon of the south tower, because he refused to abjure anabaptism. After his death, he was buried in the Wartburg near the chapel of St. Elisabeth. In 1925, a handwritten signature of Fritz Erbe was found on the prison wall.

Over the next centuries, the castle fell increasingly into disuse and disrepair, especially after the end of the Thirty Years' War when it had served as a refuge for the ruling family.

https://www.arundelcastle.org

https://www.openstreetmap.org/relation/1118816 Street view: https://goo.gl/maps/guoitK1nR6NcbhGT7

Website says open for visit "Weekdays 09.30 -17.00". There's an events page with tons of listings: https://www.arundelcastle.org/whats-on/

The original structure was a motte-and-bailey castle. Roger de Montgomery was declared the first Earl of Arundel as the King granted him the property as part of a much larger package of hundreds of manors. Roger, who was a cousin of William the Conqueror, had stayed in Normandy to keep the peace there while William was away in England. He was rewarded for his loyalty with extensive lands in the Welsh Marches and across the country, together with one fifth of Sussex (Arundel Rape). He began work on Arundel Castle in around 1067.

Between 1101 and 1102 the castle was besieged by the forces of Henry I after its holder Robert of Bellême rebelled. The siege ended with the castle surrendering to the king. The castle then passed to Adeliza of Louvain (who had previously been married to Henry I) and her husband William d'Aubigny. Empress Matilda stayed in the castle, in 1139. It then passed down the d'Aubigny line until the death of Hugh d'Aubigny, 5th Earl of Arundel in 1243. John Fitzalan then inherited jure matris the castle and honour of Arundel, by which, according to Henry VI's "admission" of 1433, he was later retrospectively held to have become de jure Earl of Arundel.

The FitzAlan male line ceased on the death of Henry Fitzalan, 12th Earl of Arundel, whose daughter and heiress Mary FitzAlan married Thomas Howard, 4th Duke of Norfolk in 1555, to whose descendants the castle and earldom passed.

In 1643, during the First English Civil War, the castle was besieged. The 800 royalists inside surrendered after 18 days. Afterwards in 1653 Parliament ordered the slighting of the castle; however "weather probably destroyed more".

Although the castle remained in the hands of the Howard family over the succeeding centuries, it was not their favourite residence, and the various Dukes of Norfolk invested their time and energy into improving other ducal estates, including Norfolk House in London. Charles Howard, 11th Duke of Norfolk, was known for his restoration work and improvements to the castle beginning in 1787. The folly that still stands on the hill above Swanbourne Lake was commissioned by and built for the Duke by Francis Hiorne at this time.

In 1846, Queen Victoria and her husband, Prince Albert, visited Arundel Castle for three days. Henry Howard, 13th Duke of Norfolk, internally remodelled the castle in time for her visit. The architectural firm responsible for design of the furniture was named Morant. The work included a suite of six rooms, built on the second floor of the south-east range at this time. The 19th-century embellishments had not been completed when this picture was published in 1880.

After the 1846 Royal visit the 15th Duke began re-structuring the castle again from 1875 to 1905. The work, which was done to the designs of Charles Alban Buckler and undertaken by Rattee and Kett of Cambridge, was completed in the late 19th century. The 16th Duke had planned to give the castle to the National Trust but following his death in 1975 the 17th Duke cancelled the plan. He created an independent charitable trust to guarantee the castle's future, and oversaw restorative works.

http://www.castleboston.com/

https://www.openstreetmap.org/way/87109189 Street view: https://goo.gl/maps/uJiRFB2rodQJd4iQA

This location is available for large events. There seems to be some small museum space but I'm unsure of how to visit. It also houses other private businesses.

The four-story granite structure was designed by William Gibbons Preston and built beginning in 1891 and finished in 1897. Due to political unrest during the period, the building was designed to withstand mob violence. Its most prominent feature is its six-story tower. It is built in the Romanesque Revival style. The building's staircases are built by the Guastavino system, as are some tower vaults.

The building was built to store armaments and contained a rifle range, gymnasium, and drill hall.

Over the years it has been known as Park Plaza Castle, Castle at Park Plaza, and The Tower.

Photo taken by me in early 2023.

https://www.visitluxembourg.com/place/beaufort-castle

https://www.openstreetmap.org/#map=19/49.83361/6.28656 Street view: https://goo.gl/maps/5PYtsLpPhz21Pk7k9

The ruins of the medieval castle are open to visitors every day from Easter until 1 November from 9 am to 6 pm.

It was probably in the 11th century that the castle began as a small square-shaped fortress on a large rock protected by a moat and a second wall above the valley. A reference from 1192 indicates that Wauthier de Wiltz et Beaufort was its first lord. During the first half of the 12th century, a keep was added and the gate was moved and enlarged. In 1348, the property came into the hands of the House of Orley after Adelaide of Beaufort married William of Orley. The Lords of Orley made significant extensions overlooking the valley. In 1477, Maximilian of Austria transferred the castle to Johann Bayer von Boppard after Johann von Orley-Beaufort committed a breach in trust. In 1539, Bernard von Velbrück became Lord of Beaufort through marriage and added the large Renaissance wing with cross-framed windows on top of the medieval walls.

The castle then came into the hands of Gaspard de Heu who had married Velbrück's granddaughter. A partisan of the Dutch resistance and the House of Orange, de Heu was captured by the Spaniards, accused of heresy and treason, and publicly executed in Luxembourg's fish market in 1593. Philip II of Spain confiscated the property and entrusted it to Peter Ernst Graf von Mansfeld, the governor of Luxembourg. Through marriage, the castle became the property of Henri de Chalon and then Gaspard du Bost-Moulin who had to sell it after being ruined by the Thirty Years War. Acting on behalf of the Spanish king, Johann Baron von Beck, governor of Luxembourg, bought most of the property in 1639. He initiated the construction of the Renaissance castle in 1643 but after he died of injuries from the Battle of Lens in 1648, the work was completed by his son in 1649.

After various changes in ownership including Pierre de Coumont (1774) and Jean Théodore Baron de Tornaco-Vervoy (1781), the castle was abandoned, fell into disrepair and at the beginning of the 19th century was even used as a quarry. In 1850, it was listed by the State as a national monument. In 1893, the new owner Henri Even restored the new building and, in 1928, Edmond Linkels cleared the rubble away and opened the medieval castle to visitors. In 1981, the property was acquired by the State.

http://www.castillodecoca.com/

https://www.openstreetmap.org/relation/1732024 Street view: https://goo.gl/maps/8i3SUsRfnhVuYzrD8

No mention of hours and days available on the website, but it does mention a few Euros gets you in.

Alonso de Fonseca y Avellaneda has been credited with the construction of the castle. The castle was built under the supervision of a master builder and most of the work had been completed by 1493. In 1502 it was decreed that castle and the town could only be passed down to male heirs, so after Alonso's death it passed on to Antonio de Fonseca. In 1512 a number of extra ornamental features were added to the keep and the castle exterior under the supervision of engineers. The castle came under attack during the Revolt of the Comuneros in 1521. Communeras troops attacked the castle in retaliation to the burning of Medina del Campo. Medina del Campo had been previously attacked by the Royalists as it housed a large number of artillery pieces, and it had subsequently been razed after Royalists met heavy resistance. In 1645, Gaspar Alfonso Pérez de Guzmán, 9th Duke of Medina Sidonia was accused to treachery after he instigated the Andalusian independentist conspiracy of 1641, and was imprisoned in the castle.

The castle went through a period of repairs and renovations from the sixteenth to the eighteenth century AD. Most notable among these renovations was the addition of the Patio de Armas in sixteenth century, the construction of a gallery between the Keep (Torres del Homenaje) and Pedro Mata Tower in the seventeenth century AD and the extensive renovations of 1715. After 1730 the castle suffered a long period of neglect that led to it falling into disrepair, and subsequently many important artifacts were either lost or destroyed. During the Peninsular War, Coca Castle was captured by the French, who occupied the castle in 1808 and vacated it in 1812. During these four years the castle further deteriorated and much of it fell into ruin. The French troops were, obviously, not concerned with the upkeep of the castle and many ornamental features fell into ruin during this time. Another incident that led to the castle falling further into ruin was the 1828 sale of materials by the administrator of the castle. As the castle was under the ownership of the House of Alba at that time, the owners tore away a number of columns, marble pieces and other ornamental features and sold them off to the highest bidder.