If you prefer to travel over the water, you can book fishing excursions from the dock at Fort Popham or day trips to the lighthouse on Sequin Island (second oldest lighthouse on the Maine coast, first commissioned by George Washington, and occupying the highest elevation of any other). Surfers often test their skills on the shoaling breakers off of Fox Island. Kayak, canoe, and paddle board rentals are available in nearby Brunswick https://www.seaspraykayaking.com/ .