Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

The humble field where the first Major League Baseball game was played.

A failed piece of Orientalism has become the proud symbol of a community.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

This giant disembodied horse head seems to balance impossibly on its nose.

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

A daily replay of the experiment that proved the rotation of the Earth.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

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

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

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

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

This elaborate towering structure was once famed for its revolutionary height.

This beloved marketplace mascot poops money and grants good luck.

Yo, Adrian!

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

World's first "penitentiary," meant to be humane, drove men insane.

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

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

Where America's first doomsday cult awaited the end of the world.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.