Yo, Adrian!

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

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

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

This might just be the TARDIS of bookstores.

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.

In which a local geological marvel becomes a quaint roadside attraction.

The oldest surviving botanic garden in the United States.

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

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Mysterious rocks that ring musically when struck.

A toxic ghost town sitting atop a massive coal fire.

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

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

A layered tribute to the work of mosaicist Isaiah Zagar.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

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

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

A scenic fort on the harbor protected Philadelphia from an attack that never came.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

This iconic Lancaster everyman has been reading the same story since 1980.

The first of Lancaster's "rural cemeteries."

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.