Philadelphia, PA: then and now

4 real landmarks in Philadelphia, each with an old photo you can fade into today's view. Find four landmarks in Philadelphia's Old City. At each one, check in to earn its badge, unlock its story, and collect a Time Card. Do them in any order. Everything stays on this phone.

• Independence HallWhere a country was argued into existence.
• Liberty BellA cracked bell with a myth bigger than its crack.
• Betsy Ross HouseA small house with a famous story that historians argue about.
• Carpenters' HallWhere the First Continental Congress met in 1774, in a guild's meeting hall.

Written from sources; not yet walked on site unless a stop says otherwise.