Featuring the largest CinemaScope screen in Pennsylvania, this drive-in has entertained moviegoers for more than half a century.

Memorial built in 1922 in remembrance of WWI casualties.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

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

These lush botanical gardens employ the most purrfect pest control force.

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

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

Yo, Adrian!

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

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.

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

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

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

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

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.

The first partially complete dinosaur skeleton was discovered here, forever changing the world's view of the ruling reptiles.

A completely round house designed for the Atomic Age.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

Step inside Lucy, the world's largest "elephant."