North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

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

In the bowels of a 19th-century brewery lurks a fine-dining restaurant offering an array of themed feasts.

A piece of baseball history is preserved in a Pittsburgh parking lot.

Catch a ride through the Pennsylvania countryside on this historic narrow-gauge railroad.

An industrial waste tourist attraction.

The oldest automobile museum in the United States.

Narrow gorges and deep pools created by long-ago glaciers.

These unique rock formations were created during the Ice Age.

One of the few remaining covered bridges in Lancaster County.

Hidden behind an empty field resides this early 19th-century cemetery.

The Paul Bunyan of the steel industry.

America's oldest drive-in movie theater has been in continuous operation since 1934.

Believed to be the birthplace of the United States Marine Corps.

The meeting of the northwestern corner of Delaware, the northeastern corner of Maryland, and the southern edge of Pennsylvania.

These hooded graves are the only of their kind in the United States.

The first marker along the famous boundary.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

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 ruins of a Massachusetts prison farm can still be found crumbling the woods of a state park.

It would take 35 firetrucks to fill this enormous glacial pothole.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.