Moss Island

Moss Island in Little Falls, New York is an igneous intrusion of Syenite in the Mohawk Valley with the Little Falls at one end. It became an island when locks were built so boats could avoid the 40 ft falls. It is known for its extremely large (40–50 ft) potholes as well as being popular with local rock climbers. It was declared a National Natural Landmark in May 1976^[2] There are ongoing efforts by the local community to turn Moss Island into a New York State Park.^[3]

• http://en.wikipedia.org/wiki/Moss Island