Worlds largest cave is big enough to fit a skyscraper and even has its own jungle
Worlds largest cave is big enough to fit a skyscraper and even has its own jungle. Some incredible photos. Wow! Also you can find some incredible pictures in this post Photos from the heart of a glacier

the video produced by National Geo of this cave was very impressive. Reminded me a lot of caves I visited in Guatemala. Similar climate and limestone formation I suppose.