One man’s religious convictions led him to build this stone castle meant to withstand an apocalypse.

Once one of the largest producers of pig iron in the world.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

This historic church houses the grave of a Scottish soldier who fought in the Battle of Waterloo.

The wooden house where the jazz great learned to play the piano.

A 315-foot spire jutting out from the Blue Ridge Mountains makes for breathtaking views.

Practice your Dirty Dancing lifts in the manmade lake where Johnny Castle himself did.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

This granite rock face is named for the magnificent reflection that occurs when the sun hits it just right.

Hidden amid a collection of trails is the site of a tragic crash.

This 5-by-6-foot wooden hut is the smallest historic post office in the U.S.

The scant remains of this flooded historic village can be explored in one of the most remote areas of the Great Smokies.

Railroad came. People came. Railroad left. Town died.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

These early tent-shaped grave coverings are unique to Appalachia.

Visit this playground of waterfalls, caves and sinkholes.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

The art studio of an early 20th-century painter, hidden amid the Great Smoky Mountains.

An abandoned town is hidden in Great Smoky Mountains National Park.

One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

A failed utopian experiment for British expats in the American South is now a Victorian village frozen in time.

A lush green oasis in the middle of Chicago.

Internationally known record store and purveyor of "dusties."

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.