Historically speaking, Philadelphia is a city of superlatives: the world's largest municipal park; the best collection of public art in the United States; the widest variety of urban architecture in America; and according to some experts, the greatest concentration of institutions of higher learning in the country.
9 North American Museums in Makeover Mode
North America's art museums are in the midst of a building >>
Go to Jail -- 4 U.S. Slammers Worth a Look
Dark as it might sound, some of America's most diverting >>
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