this post was submitted on 21 Mar 2026
149 points (100.0% liked)
pics
27764 readers
503 users here now
Rules:
1.. Please mark original photos with [OC] in the title if you're the photographer
2..Pictures containing a politician from any country or planet are prohibited, this is a community voted on rule.
3.. Image must be a photograph, no AI or digital art.
4.. No NSFW/Cosplay/Spam/Trolling images.
5.. Be civil. No racism or bigotry.
Photo of the Week Rule(s):
1.. On Fridays, the most upvoted original, marked [OC], photo posted between Friday and Thursday will be the next week's banner and featured photo.
2.. The weekly photos will be saved for an end of the year run off.
Instance-wide rules always apply. https://mastodon.world/about
founded 2 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Those ancient stone arch bridges are remarkably durable, and can survive with very little maintenance. Many large Roman bridges and aqueducts were built with no mortar whatsoever, and everything held together strictly through gravity. That requires quite a bit of skill with the stone cutting, though, in order for the weight to be distributed properly. And it makes them extremely costly and time-consuming to build. Wikipedia says the bridge pictured here took 30+ years to build -- and that's after the original bridge built here collapsed a few years after being built.
The white lattice-pattern in this case seems to suggest mortar?