This might just be the TARDIS of bookstores.

Dr Barnes' $25 billion private collection of art and arboretum.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

Mysterious rocks that ring musically when struck.

A toxic ghost town sitting atop a massive coal fire.

A layered tribute to the work of mosaicist Isaiah Zagar.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The obelisk meant to mark the founding father's grave at Monticello is actually on the University of Missouri campus.

A Mormon place of exile in Missouri.

This Italianate Villa-style castle is pretty to look at, just keep off the private property.