America's most famous piece of self-built architecture.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A little piece of Paris in the sultry south of the U.S.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

A giant open-air sculpture made of over 200 full-sized boats.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

This super steep hike ascends 2,000 feet in less than a mile.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

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

The highest bridge in America was built for an almost unnervingly small amount of money.

This naturally-sourced hot spring is now home to a clothing-optional resort.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

A replica that won't float away.