Officially, Treat Island is part of the city of Eastport, Maine, and once had its own thriving fishing village, school, and post office.
Today, though, nobody lives there. Instead, it’s one of the many preservations of the state’s coastline now held by the Maine Coastal Heritage Trust.
At low tide, it’s connected by a rocky breakwater to Dudley Island, which is officially in the town of Lubec.
The only way to get there, do note, is by water.
To take a quick tour upon landing, including its 7,000 feet of shoreline at the mouth of Cobscook Bay, check out the free photo album at my Thistle Finch blog.
I just missed a shot of two eagles. A week later, with the water higher, I watched two harbor seals at play. Cobscook Bay is less than a mile downstream. 
Jnana's Red Barn 