Submarine hotels are unique accommodations located underwater, offering guests a chance to experience marine life up close. These hotels often feature large windows that provide stunning views of the ocean and its inhabitants, creating a one-of-a-kind stay. Some popular examples include the Poseidon Undersea Resort and the Jules' Undersea Lodge. Guests at submarine hotels can enjoy various amenities, such as fine dining, spa services, and guided underwater tours. These hotels are designed to provide a luxurious experience while allowing visitors to immerse themselves in the beauty of the underwater environment, making them a popular choice for adventurous travelers.