The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

This smaller cousin of the Forbidden City has gone from ancestral sacrifice to tourist's whispers.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

At 207 feet, one of the world's longest continuous escalators.

Visitors to this library are in for a real-world education in modernist architecture.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

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

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

A downtown park built on top of unclaimed graves.

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

A unique geological area spiked with wind-carved rocks that resemble teepees.

An enthusiastically interactive mining museum that won't let black lung ruin the fun.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

When ecosystems collide in the arid Southwest.

Oddly shaped rock formation, misassociated with a nearby utopian community.

This otherwise unremarkable ski town building marks the site of Butch Cassidy's first robbery.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.