Perhaps the coolest thing about this underwater wonder is that it’s designed as an abandoned apocalyptic city. Divers can explore its submerged treasures, complete with abandoned apartments and garage, while playing underwater pool and arcade games. State-of-the-art lighting and sound systems have been fitted inside the pool to create different atmospheres, while the water is filtered using NASA-developed technology. The pool also doubles as an underwater film studio -- the largest of its kind in the region. Not a certified deep diver? You can watch all the fun through glass panels from the 80-seat restaurant next door.