The haunting reflective pools here are not only lit up but surrounded by choral music to make the experience all the more dramatic. Although the cave is named after a type of cheese, you won't find any here.
Believe it or not these caves are somewhere in the neighborhood of 400 million years old. If you go, be careful of the monkeys that populate the area--they're notorious for taking things right out of the hands of visitors.
It takes about an hour and a half to complete the tour at this UNESCO World Heritage Site which includes part of the Reka River. Make sure to bring a sweater as temps really drop when you reach the bottom.
Important both for its high biodiversity and for its karst features, Gunung Mulu National Park, on the island of Borneo in the State of Sarawak, is the most studied tropical karst area in the world. It is one of 3 World Heritage Sites in Malaysia!
These paintings are thought to be about 17,000 years old, although they look almost modern. They were actually discovered by a group of teenagers in the 40s and in 1979, the caves were named a UNESCO World Heritage Site.
Interestingly, if you've been in another cave recently and you're wearing the same clothes, you may have to change. Something called "White Nose Sydrome," which is caused by contamination from other caves, hurts the hibernating bats here.