Burntcoat Head, Nova Scotia, on the Bay of Fundy. Highest tides in the world, with an average of 47.5 feet and an extreme of 53.6 feet. At low tide (pictured here) one can walk out onto the ocean floor for quite some distance. At high tide – well, you can see the water line on the shore and "island" at left. Twice each day the Bay of Fundy fills and empties its 160 billion tons of water.