11. The Lower Hudson - A Long Arm of the Sea
The lower Hudson south of Troy is a long arm of the sea, influenced by the Atlantic Ocean's high and low tides. Rising and falling tides on the Hudson cause the river's currents to switch direction - alternately flowing south towards the sea for a few hours and then north towards Troy. Native Americans recognized the tidal nature of the river, calling it Mahicantuck, which means "river that flows both ways."