#6 Bahamas
Stunning blue waters surround and pass through the tidal channels of islands in the Bahamas. Small tidal changes on the banks cause water to flow through the narrow channels between the islands, first in one direction and then the other. The darker blue sections of water are the deepest parts of the channels and the surrounding light blue color is more shallow (less than 25 meters / 80 feet). This photo was captured from the International Space Station and is courtesy of NASA:
