Water Discus Hotel, Dubai

Dubai is no stranger to extreme feats of engineering, and its Water Discus Hotel aims to become the first underwater lodging in the emirate. The structure will include both an above-water and below-water section (both are disc-shaped like something out of Star Wars, but their actual sizes aren't yet determined). The above-water disc will be connected to a series of satellite discs housing the hotel's spa, garden, and swimming pool. The below-water disc features 21 two-person rooms, a dive center, and a bar that will let you drink with the fishes. A vertical shaft containing an elevator and a staircase will offer access between the two.Design mechanics call for five solid legs to extend down from the lower disc and stabilize the structure on the seabed, while keeping it easily mobile in case the undersea portion needs to resurface for repairs. In the unlikely event of flooding, the hotel's satellite discs are buoyant and can be released and used as flotation devices. Additional high-tech perks include underwater internet and an upper-deck landing pad for helicopters. Oh, and the hotel rotates.