/www.urban-photos.com
The pictures posted so far of Philadelphia City Hall fail to show it in context. It's quite large and the tower gives 5 clear views down the city's major roads.
and the other end of that Parkway
Just a side note.
Philadelphia's biggest subway station sits underneath connected to basically all of Philadelphia's transit lines and rail system and a large multiple block underground concourse.
http://en.wikipedia.org/wiki/City_Hall_(BSL_station)
http://en.wikipedia.org/wiki/Suburban_Station