Did you know that just off the coast of Eastport, Maine is the largest tidal whirlpool in the western hemisphere? It's the 'Old Sow' whirlpool has a diameter of approximately 250 feet.
Just off the coast of Eastport, Maine, in the tidal waters of Passamaquoddy Bay is a swirling vortex of water known as Old Sow, the second largest whirlpool in the world.