These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

The world's largest fire hydrant is supposedly tornado-proof.

A museum packed with instruments, lyrics, and other mementos of the American folk icon.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

One of Gettysburg’s least visited battlefield memorials is off the beaten path, but worth a visit.

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

Where the famed frontiersman was born, raised, and survived Quaker intrigue

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

A diorama of the Civil War, fought by cats.

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

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

A museum dedicated to the history & joys of the trail & your best chance to see hikers throwing up ice cream.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

This shrine to McDonalds' most iconic sandwich holds a 14-foot tall burger.

There aren't too many operational funiculars around, but Pittsburgh has two!

Yo, Adrian!

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

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

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

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

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