Glimpsed across the Thames River in the adorable mini-city of Groton is Fort Griswold, built 1775-1778. This fort played an heroic role in the US Revolutionary War, in that everyone in it was either killed, captured or driven away by the British.

What's mostly visible from this distance is the Groton Monument, which the citizens of Groton erected in 1830, in remembrance of the men who died at the fort. The fort itself is only visible as a bit of a mound beneath the flag to the right of said monument.