This collection of French root art looks like an indoor fairy wonderland.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Rippling sand dunes frozen in the Arizona rock.

Most-visited and most-photographed slot canyon in the American Southwest.

Museum mostly in name, and only a restaurant depending on the day, this place could only exist in Marfa.

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

A priceless collection of the Nation's cryptologic history.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This submersible road connecting a French island to the mainland is lined with safety towers for when the tide strands travelers.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

Less a museum than a bizarre fantasy world created by artists and engineers.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

A terrific purveyor of natural history objects and curios.

Tucked in the back of this amazing antique store is an important piece of medical history.

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

An isolated dive site teeming with cnidarians.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

The exact whereabouts of this surreal cabinet of curiosities are rarely the same place twice.

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

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

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.