This aquatic tour will take you down the most interesting waterways of St. Herman’s Blue Hole National Park. Your will begin with an airboat ride through the park’s wetlands, where your guide will point out some colorful local wildlife. Then you will visit the Crystal Cave, which you can enter only with the help of a guide.

Maya attributed spiritual importance to Crystal Cave, perhaps because of the glimmering mineral formations that crowd the walls of its immense caverns. In order to enter you will need to make a descent of 15 feet (4.5 m) into the cave’s mouth. The Crystal Cave is a wet cave with fairly deep, flowing waters. Once inside, your tour will continue on inner tubes. You’ll float past the cave’s incredible formations, including an enormous group of stalactites that closely resembles a frozen waterfall.