Shrunken heads aside, this place is a far cry from Ripley's Believe It or Not.
It's time to take a detour to some of America's under-sung cities. David Whitley leads the way.
A vast private art collection amassed over decades in the US is now open to the public, writes David Whitley.
From street murals to sensational jazz, Debbie Kruger tunes into the rhythm of the city.
It's been 30 years since Sylvester Stallone's Rocky but the tough streets of Philadelphia have changed little.