The largest man-made crater in the U.S. marks the spot where we once tested mining with nukes.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

Water of undetermined depth has attracted rare fish and cult leaders alike.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

The best Tiki bar in Las Vegas.

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

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

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

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Odd outsider art installations surround a Gold Rush-era ghost town.

This former lieutenant governor's home is brimming with curiosities.

A subterranean relic of the Spanish Civil War hides below this picturesque park.

This 8th-century Bavarian monastery is home to an exquisite Baroque-era library.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

A little-known ruin with a convoluted history and a fascinating latrine drainage system.

The world's largest wooden structure.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

Nestled amid the peaks and lochs of the Scottish Highlands, this inn and pub has played host to outlaws and ghosts.

Legend says a witch conjured the world's third largest whirlpool to protect Scotland from a nasty pirate.

This Gothic castle-like portal is a testament to the amazing craftsmanship of the navvies who built the railway tunnel.

A mysterious ruin shrouded in more folklore than fact.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.