These unique rock formations were created during the Ice Age.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

The first of Lancaster's "rural cemeteries."

Bizarre Cavern.

Outsider art meets paleontology at this roadside reptile repository.

The world's longest known cave system.

Incredible miniature towns and buildings created and decorated with thousands of tiny rocks.

The only zoo where you can buy animals that won't need feeding.

This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

Time travel with sweets across history at this research-based candy store.

In 1952, a strange encounter in the woods of West Virginia led to the legend of a 10-foot-tall monster with glowing eyes and a distinctive style.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

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

A local prank turned town icon.

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

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

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

A toxic ghost town sitting atop a massive coal fire.

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

This historic old movie house was the scene of one of the Blob's most iconic attacks.

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