Manhattan Borough Historian Michael Miscione pointed to Fort Washington, which occupied an area around West 183rd Street in Washington Heights. This was Washington's headquarters during the war--well, at least during its first months. On November 16, 1776, British and Hessian troops overran the fort, driving rebel forces out of New York City, which would remain in British hands until the war was over.
"Today a partial outline of the fort's walls can be seen inlaid with cobblestones in the pavement of Bennett Park in northern Manhattan," says Miscione. "A monument to the fort's defenders was erected in November 1901, before the park existed. It's still there, embedded in the east wall of the park, facing Ft. Washington Ave."