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

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

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

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

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

The ruins of a cotton mill that was burned in the Civil War are still hidden in a Georgia forest.

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

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

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

Macabre astrological automaton clock dating to the late 1400s.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The world's oldest known salt mine.

The fairy tale castle of the "fairy-tale king."

Daily jousts and dancing barrel makers in Munich's mechanical clock.

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

A downtown park built on top of unclaimed graves.

These rows of World War II-era bunkers were the scene of some of the infamous Mothman sightings.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.