Last updated: 11:37 AM ET, Wed September 20 2017

5 Things to Know About the Biggest Haunted House in the US

Features & Advice Will McGough September 19, 2017

Sinister gargoyle at Terror Behind the Walls in Philadelphia
PHOTO: Sinister gargoyle at Terror Behind the Walls in Philadelphia's Eastern State Penitentiary. (photo courtesy of Eastern State Penitentiary)

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