A star fort along the C&O Canal in western Maryland that protected America in three wars.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

Hidden in the hills of Western Pennsylvania lies one of the best-kept ghost towns in America that you can legally visit.

Locals call this magical moss-covered walkway the "Emerald Path."

There are many ways to enjoy this old-growth forest and its views.

The cold-blast iron furnace generated 1,000 tons of iron per year at its peak.

Blossom has blossomed from a dairy advertising effort into a community mascot near Sligo, Pennsylvania.

An abandoned railroad tunnel transformed into a creepy path for hikers and cyclists.

The first burial place of the Harmonist Society, a utopian community for which the surrounding town of Harmony is named.

This eccentric mansion museum holds a impressive collection of rare and automatic instruments.

This icon of the Atomic Age now lays dormant.

In rural Iowa, an imported 19th-century windmill overlooks an unlikely enclave of Danish culture.

Lured here by the promise of tens of thousands in gold, Jesse James started a quintessentially American trend of robbing trains in-motion.

A brick-paved former section of the historic coast-to-coast highway.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

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

A train station that was abandoned by the coal industry and converted into a cocktail bar. Now it’s home to the local visitor bureau.

This huge, disused viaduct is now a crumbling concrete underworld of covered in years of graffiti.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

This demolished goliath of American industry once loomed over the depressed town it once made thrive.

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

The museum calls itself the "National Museum of the Paranormal" and is full of eerie oddities.