Spectacular mineral formations fill these caves, which have been used for everything from smoking meat to stashing illicit liquor.

This university transit system is a 1970s vision of the future.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

The world's largest fully steerable radio telescope.

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

Take a steam-powered ride straight out of the past on this Appalachian rail line.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

The home of famed war correspondent Ernie Pyle is now a library and museum dedicated to his memory.

Apparently, the whole cosmos emanates from this plain concrete tower.

Owned by Native American women, this brewery is a celebration of indigenous culture in the American Southwest.

This opulent Pueblo Deco movie palace melds Art Deco and Native American motifs.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

A museum devoted entirely to the rattlesnakes and snake-related art.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

Eat like pre-Columbian Native Americans in this New Mexico restaurant within the Indian Pueblo Cultural Center.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.