Fort Mifflin

Fort Mifflin , which is open to visitors from March through December, offers tours that focus on a Revolutionary War battle and the site’s strategic location in the Delaware River at the mouth of the Schuylkill River.

The fort survives with signs of the bombardment by British forces. The British fired more than 10,000 cannonballs at the fort, making it the greatest bombardment of the American Revolution.

On display are British-produced Brown Bess rifles and other war instruments.

There’s also a store that sells various artifact replicas and even Colonial-style candies.

Annual reenactments, tours, sleepovers and other activities are punctuated with ghostly tales and the hum of airliners from the nearby Philadelphia International Airport .