This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Experience the pivotal Civil War battle at this interactive museum.

Remember and reflect at this 9/11 memorial site.

Constrained by time and topography, this civil engineering landmark was constructed 100 feet above Starrucca Creek over the course of a single year.

On the outskirts of Pennsylvania’s capital city, a reminder of the worst accident in U.S. commercial nuclear power plant history.

The train collection of an eccentric New England seafood mogul is now a National Historical Site.

A museum dedicated to the history of electric interurban transit near the home of the first electric trolley system in the United States.

This abandoned iron furnace was one of the first to use coke—a type of high-carbon fuel—to make iron.

Abandoned blast furnaces are an enduring reminder of Scranton's once booming iron business.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

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

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

Yo, Adrian!

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

An abandoned stretch of highway, deteriorating next to the operational one.

A toxic ghost town sitting atop a massive coal fire.

The world’s first penitentiary, meant to be humane, drove men insane.

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

This sprawling museum holds one man's giant collection of real tanks.

A collection of vehicles across American military history.

Erosion has transformed this sandstone boulder into a massive dune-filled cavern.

An innovative attempt to break a siege in the American Civil War still scars the earth today.

Lines from a walking song are etched into a rock in Natural Bridge State Park.