A clear blue swimming hole with hidden caves, still unexplored.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

This building is a recreation of the gatehouse that separated Los Alamos from the outside world during the era of the Manhattan Project.

The symbol was surreptitiously built into the river bank by German prisoners of war.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A museum dedicated to the alleged Roswell Incident.

The world-record holder for the longest bridge stretching continuously over water.

The ruins of an important pilgrimage destination for worshippers of a Maya fertility goddess.

This mill has survived a tumultuous past to still produce flour and cornmeal.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

One of the longest water bridges in the world was built over a supposedly haunted swamp in Louisiana.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

A monument celebrating the idea of reaching inaccessible places.

"We Seceded Where Others Failed."

Built following the War of 1812, this fort has withstood hurricanes for centuries.

The legend of a local monster still haunts this small town.

Foragers once flocked to this big beautiful bayou to hunt for pearls.

Explore 4,000 years of European and American art history in the heart of northwest Louisiana.

It would take you approximately an hour and a half to walk to the end of Mexico's largest pier.

A hollowed-out baobab that became the horrific final resting place of leprosy sufferers, with gruesome evidence to prove it.

These naturally balancing rocks were pictured on every Zimbabwean banknote, up to the 100 trillion-dollar note.

This trio of bronze giants celebrate the influential trip to Britain that led to Botswana's independence.

A historic freight system that found the true gold rush is in tourism.

This shrine to the patron saint of Alaska sits on a small tidal island and was built from the land’s own beach stones.