This is yesterday’s sun setting behind the Pumpkin Island Lighthouse. (Thanks for the idea go to Werner Gansz, a fine photographer.)
Here's a daylight image of the three-acre island, taken last year:
The lighthouse became operational in 1854, signaling the rocky entrance to Eggemoggin Reach, northwest of Little Deer Isle. The island-studded Reach, known as one of the world’s best sailing channels, runs between Penobscot Bay and the Atlantic Ocean, with Blue Hill Bay in between. The Lighthouse was discontinued as such in 1933 and Pumpkin Island is now privately owned. (Little Deer Isle, Maine)