The Waitomo Glowworm Caves is a popular tourist destination in New Zealand. The caves formed over 30 million years ago underwater, as fossilized chunks of coral, fish skeletons, and sea shells layered and compressed to create a dense limestone.
When explored in the late 1800s, people were amazed by the “twinkling glow” coming from the ceiling of the caves, as well as the remarkable limestone formations. The cave is mainly home to insects, which include albino cave ants, giant crickets, and of course, glowworms.
Eventually, the Waitomo Caves were opened to the public and are now welcoming an average of about 400,000 visitors a year.