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Is cave exploration an indoor or an outdoor activity?
(infosec.pub)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
Many caves are modified to accommodate their visitors. This could be a small as leaving behind oxygen tanks or equipment, or as advanced as installing electrical wiring and ventilation. This was the case of several caves I visited as a tourist with no real exploration skills.
there are other ways to modify a cave
I'd like to know more about this picture!
Eagle’s Nest (sinkhole) in Florida
Thanks! That was an interesting read!