Philadelphia’s City Hall is the center of the city. The building beautiful and its tower’s clocks are famous for having 8 metres (26 feet) in diameter. The building is topped by a large bronze statue of the city founder, William Penn, and has a Observation Deck right below it.
The entrance to the deck is free and the access is by an glass-walled elevator that allows you to see the structure inside the tower. It’s pretty cool. And the deck gives you a great sight of the city.