You can stay near the sea, or on the sea, but what about under it? Currenty under construction, the Poseidon Undersea Resort promises to offer 25 underwater suites that will let you take in amazing views of the sea floor and the creatures that live there. Located on a private island, the resort will also offer 51 on-island accommodations, including 24 beachside and 26 over-water bungalows, as well as a reception building, six restaurants and three bars — one of each housed underwater — two swimming pools, tennis courts, a dive shop, a luxury spa, a fitness center, and a 9-hole golf course. Oh, and if that wasn't enough, you'll also have access to 3-passenger submarines which you can pilot around the 5,000 acre lagoon.