From a high hill on the northern end of Deer Island, you can see dramatic views of Boston’s skyline to the west, Hull’s windmill to the southeast, the harbor’s 29 other islands, lighthouses near and far, and open sea all the way to Europe. At the southern end of the island is the $4 billion wastewater treatment plant, opened in 2001 to end centuries of sewage discharges to the harbor. This island facility, surrounded by parkland, has become the technological jewel in the crown of the Boston Harbor Islands National Park.
The giant treatment plant – especially the 15-story egg-shaped sludge digester installation—form a dramatic backdrop to the 60 acres of park that ring the island.

Click for WalkBoston Winthrop Deer Island Walking Map on Google Maps