A popular swimming hole that hides one of America's most deadly diving spots.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

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

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

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

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

A wall of chewing gum moonlights as collective art.

This former coal gasification plant found a curious second life as a popular public park.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The subtle science of a master molecular gastronomist.

A "Titanic" superfan changed his name to Jack and set up this strange shrine to the blockbuster, complete with Korean food and Tarot readings.

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

A modern mechanical planetary system, part of a 10,000 year clock.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

A house carved into a rock in the 1940s.

A castle built by an eccentric medieval enthusiast in rural Ohio.

A ghost town at the airport is now a refuge for blue butterflies.

Historic funicular railway, believed to be the shortest railroad in the world.

When ecosystems collide in the arid Southwest.

This former Norwegian sailor's church is slowly being taken over by ramshackle robot musicians.

A faux European lane smack dab in downtown L.A.

Canyon walls shrouded in ferns.