Gran Caverna de Santo Tomás, CubaCave The largest cave system in Cuba and the second largest in the Americas: over 46 km of surveyed passage in galleries stacked on seven or eight levels, depending on whose survey you read, draining the 400 metre Quemado range. About... Open it on the map
Viñales Valley and its caves, CubaCave A valley floor with limestone islands standing up out of it. The mogotes of Viñales are karst towers up to 300 metres tall, found nowhere else in Cuba and matched really only in Southeast Asia, in Borneo and Vietnam and down the... Open it on the map
Every one of these is sourced
Each entry links to the record it came from. Access rules, permits and land status vary by country and are noted where the source states them, check locally before you go.