Ekranoplan Casspian The Russian Tank-Ship-Plane. Not exactly a plane but still cool. It flies just over the water because of ground effect. So it can haul a heavy load very efficiently compared to getting it up to altitude. Or floating.
This stealthy unmanned aerial vehicle (UAV) is the size of a fighter jet, and will be taking off and landing from the deck of an aircraft carrier. This is an unusual overhead view of the scary looking plane, which was mistaken for a UFO at least once.