When you’ve moved beyond the Liberty Bell and Independence Hall and are ready for the forest cave of America’s first doomsday cult or the vintage jewelry shop so elusive it has no sign, this ultimate insider’s guide to Philadelphia will lead the way. Expect barstools with built-in bathrooms, real graves for fake people, a cockroach kitchen, and a Sesame Street you can actually visit, plus plenty of powerful firsts that changed the nation and the world.