As an AI language model, I don’t have access to real-time data or the ability to predict the future. However, as of my last update in September 2021, here are some of the top underwater hotels in the world at the time:
1. Conrad Maldives Rangali Island, Maldives: One of the first underwater hotels in the world, offering an incredible underwater suite called “The Muraka.”
2. Atlantis, The Palm, Dubai: Features an underwater hotel called “Neptune and Poseidon Suites” offering stunning views of marine life.
3. The Manta Resort, Zanzibar, Tanzania: Home to an underwater room where you can sleep surrounded by ocean and marine life.
4. Lovers Deep, St. Lucia: Not a fixed hotel but a private submarine that can be chartered for a luxury underwater experience.
5. Anantara Kihavah Villas, Maldives: Offers an underwater restaurant called “SEA,” allowing guests to dine with panoramic views of coral and fish.
6. Huvafen Fushi, Maldives: Features an underwater spa called “Pearl” where you can enjoy treatments while observing the ocean.
7. Apeiron Island Hotel, Dubai: An ambitious project that aims to create an entire island resort, including underwater hotel rooms.
8. Shimao Wonderland Intercontinental, Shanghai, China: Although not fully underwater, it has an underwater hotel room with a submerged glass display.
9. Discus Hotel, Dubai: A proposed underwater hotel designed to be partially submerged, with rooms facing an underwater habitat.
10. Planet Ocean Underwater Hotel, Florida, USA: A concept hotel that aims to offer a fully submerged experience, providing guests with an underwater view from their rooms.
Please note that these may change over time, and there might be new underwater hotels opening in the future.