The 13 Best Museums in Philadelphia, From Art Galleries to Medical Museums | Condé Nast Traveler

"Eastern State Penitentiary, where crime boss Al Capone famously served time, was once considered the future of America's corrections: It was the most expensive prison constructed and was considered revolutionary. It's impossible to enter without getting the chills. With its imposing Gothic architecture, crumbling walls, and somber history, the building has a haunted feel. Yet it's possible to find beauty within the cracks—there's a reason why it's so photogenic and frequently pulls double-duty as a film location." - Nancy DePalma