Batu CavesCave A vast limestone cave system in Malaysia, 400 million years old, reached by 272 painted steps guarded by a 42-metre golden statue of Murugan, and one of the most important Hindu shrines outside India, the heart of the Thaipusam... Open it on the map
Mulu’s Sarawak ChamberCave Deep in Borneo, in Gunung Mulu National Park, is the largest cave CHAMBER in the world by area, the Sarawak Chamber, big enough to hold dozens of jumbo jets, and the Deer Cave, whose mouth is among the largest cave entrances... 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.