These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

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

Steepest flood safety railway in the entire world.

The graffitied ruins stand hidden within the Pennsylvania woods.

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

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

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

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

Small Nevada town embraced its designation as the "Armpit of America" with an Old Spice-sponsored festival.

A hidden gem of a saloon in the middle of a ghost town.

This arts and culture cultural center explores the diverse cultural heritage of the American West.

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

The home and studio of a visionary woodworker now stands as a museum and example of his artistic genius.

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

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

When the Austin Dam failed it destroyed much of Austin...and then it failed again.