Reversing falls are caused when the water level between one water body and the ocean is different at high and low tide. West Pond on Schoodic Peninsula in Acadia National Park has a reversing falls. This image shows low tide where the land on both sides of the falls, the stream in the foreground, would be submerged at high tide. The trees at the left are on Pond Island, which marks the extent of the high tide. Mt. Desert Island is at the horizon. Click on the image for a larger view.