The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

Alexander Hamilton’s creation caused quite a bit of controversy.

This beloved marketplace mascot poops money and grants good luck.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

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

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

Step into a pastel time capsule where candy is truly dandy.

The first American department store, and home to the largest operating musical instrument in the world.

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

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

One of the oldest of its kind.

A layered tribute to the work of mosaicist Isaiah Zagar.

Century-old shop, specializing in Occult products.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

A piece of outsider public art accompanied by a strange urban legend.

A sprawling maze of used books piled from floor to ceiling.