The Lost Chambers is a maze of tanks and tunnels decorated with the mock ruins of mythical Atlantis, and centered on the vast Ambassadors Lagoon, one of the world’s 10 biggest aquariums. Exploring the tunnels gets you up-close to multitudes of marine creatures, from sharks, rays, eels, and seahorses to piranhas and reef fish. You can also enjoy an array of exciting marine adventures separately or in addition to your visit.
Visitors can purchase a day pass or any one of several underwater activities—booking them online in advance to save time. Adventures include scuba diving, snorkeling, and underwater walks in the Ambassador Lagoon, plus behind-the-scenes tours to learn more about the marine life. Another popular option is to upgrade a day pass with admission to the hotel’s Aquaventure Water Park.