The Hudson River is the deepest river in New York State and, in fact, one of the deepest rivers in the entire United States. While its average depth is about 30 feet, it reaches its maximum depth of approximately 216 feet (66 meters) at a point known as World's End, located near Constitution Island and West Point. This extreme depth is due to the river's geological nature as a "tidal estuary" or a "fjord"—a valley carved out by glaciers during the last ice age. The Hudson is so deep and wide in this section that it can accommodate large ocean-going vessels far inland, which is why the Port of Albany is a significant maritime hub despite being 150 miles from the Atlantic Ocean. Other deep rivers in New York, such as the Niagara or the St. Lawrence, do not reach the sheer vertical depths found in the glacial "trench" of the Highlands section of the Hudson.
Seneca Lake is the largest of the glacial Finger Lakes of the U.S. state of New York, and the deepest glacial lake entirely within the state. It is promoted as being the lake trout capital of the world, and is host of the National Lake Trout Derby.