Roll out your sleeping bags to camp out with the ghosts of the American Revolution. Paranormal investigators will teach you the techniques before taking you on a tour of the hotspots, including casement 11, a solitary confinement cell. The SciFi show Ghost Hunters featured Fort Mifflin’s haunting in a Season 4 episode.

It’s said that Benedict Arnold's second wife Peggy Shippen Arnold haunts the drawing room of Powel House. Samuel Powel, the last mayor of Philadelphia under British rule and the first mayor of the independent city, bought the house in 1769. Powel and his wife frequently entertained members of the Continental Army whose ghosts have been seen descending the house’s mahogany staircase in party clothes.

British General James Agnew used Grumblethorpe as his headquarters during the Revolutionary War. He died in the house's parlor and some report they can still see his bloodstains on the floor. Justinia, an orphan from the Yellow Fever Epidemic of 1793, is also said to haunt the house, accompanied by the smell of baking bread.

Divorce can be haunting—especially for Philip Sying Physick, the “father of American surgery,” and his wife Elizabeth, who had a strong attachment to a tree in their backyard. Physick had the tree cut down and Elizabeth died soon after. Some say she can still be seen weeping for the tree in the backyard.

One of the oldest rural cemeteries in the United States, Laurel Hill is full of paranormal hotspots. Notable burials include congressmen, military officers and artists. Starting on the 26th, the cemetery will run flashlight tours to take visitors through the gravestones.

For some wild and crazy paranormal activity, head to the Philadelphia Zoo, the oldest in America. Poltergeist activity has been reported in The Pennrose Building and the Treehouse Building. Other visitors say the ghost of a woman in a long dress stands at the top of the staircase in the The John Penn house.

In 1854, a bride was getting ready for her wedding when an oil lamp fell and her dress caught fire. The groom died trying to save his betrothed, but they both perished. Today City Tavern continues to be a popular spot for wedding parties, and many have reported seeing a woman in a wedding dress wandering the upstairs rooms.

Moyamensing Prison was at Passyunk and Reed streets until the late 1960s, when it was torn down. What's now a parking lot for was once the gathering place for crowds to watch executions—and one, particular. H.H. Holmes, often called America's first serial killer, may have been responsible for 200 murders. Let's hope his ghost doesn't cruise the Acme.

It's rumored that aside from all the normal animal life you might see at the wildlife refuge near the airport, you might also spot the immortal Ape Boy of the Chester Swamps, who started as a regular red-headed kid but was bullied so horribly, he fled into the forest and took on apelike aspects. He moved to Tinicum when his native Chester was overdeveloped, and may sometimes be spotted.