Bay of Fundy, Canada
Check out the stats ....
Twice everyday the Bay fills and empties of its 100 billion tonnes of water, creating the highest tides in the world. The height of the tide is 3.5 meters (11ft) along the southwest shore of Nova Scotia and steadily increases as the floodwaters travel up the 280 km (174 miles) of shoreline to the head of the Bay where in the Minas Basin the height of the tide can reach 16 meters (53ft).
http://en.wikipedia.org/wiki/Bay_of_Fundy