Visit the Great Barrier Reef via Google

Google Street View allows you to travel through the Amazonian Rainforest, the San Diego Zoo, even a few buildings, but come September 2012, you can even swim along the perimeter of the Great Barrier Reef just as though you were looking at the Street View of a place around your hometown.

Obviously, they didn't drive their famous Google Street View Car along the ocean floor. Instead, the images are courtesy of the Catlin Seaview Survey, which involved sending a mounted cluster of cameras attached to a sort of "ocean scooter."