Your final traverse takes you to a rock shelf, protruding from the side of the large tunnel - like entrance to the cave where your tour ends with an exciting rappel to the floor. (belizescuba.com)
Other features of the Giant Volcano include stalagtites which can remain out of sight to reveal a secret entrance to the cave, you just press a skull to make them drop down. (mummymummymum.com)
The ancient structures — more than 330 meters inside the current entrance to the cave — include a scattering of small, deliberately arranged heaps of stone along with two large rings, one about 2.2 meters across and the other nearly three times that size. (sciencemag.org)