Eerie shadows dance on the walls as a sliver of light from the mobile phone reflects off the underground stream. Bats flutter out of crevices in a mass of flapping wings, their high-pitched shrieks magnified in the claustrophobic passage. Heart pounding, you reach out to the nearest wall for support when you feel something crawling up your arm. A cave can be a scary place. It can even be dangerous place. But it is also a breathtakingly beautiful place, a subterranean paradise where art and science fuse to form some of the most extraordinary images and structures. It is a photographer’s delight. A living laboratory for scientists.