The coastal town of Eastport, though small in size, possesses the deepest port on the East Coast. It is located on Cobscook Bay, which is notorious for its ripping tides and powerful currents. The bay’s powerful surges have given birth to a rare phenomenon: reversing falls. Near Pembroke, the rapids that course over Cobscook’s rocky bottom actually reverse direction with the tide. The churning water kicks food to the surface, supporting rare forms of aquatic life and attracting seals and eagles at high tide. The tidal flats around this area are an excellent place to search for fossils and view migrating shorebirds.
Passengers on the ferry between Eastport and Deer Island will catch sight of another natural wonder—Old Sow, believed to be the biggest whirlpool in the Western Hemisphere. Eastport is also home to America’s only remaining mill producing stone ground mustard—Raye’s Mustard Mill. Tours of the working museum are available. North of Eastport, more than 700 members of the Passamaquoddy Indian tribe reside in the Pleasant Point Indian Reservation. The Waponahki Museum preserves their history, and authentic native baskets are sold nearby.