Is Eastern State Penitentiary haunted?
United States Reported haunting level 5 of 5

What actually happened
Nearly 85,000 people were confined here. Al Capone spent part of 1929 in a furnished cell that visitors can still see.
The history
Opened in Philadelphia in 1829, Eastern State made isolation central to prison design. Nearly 85,000 people passed through before it closed in 1971.
What people report
Officers and prisoners reported eerie experiences by the 1940s. The historic site distinguishes those accounts from its documented prison history.
That paragraph is reported tradition, not a claim about what is there. The history above it is sourced; the stories are recorded because people tell them.
Visiting
2027 Fairmount Avenue, Philadelphia, PA 19130, United States