Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Paris' linguistic guide to the international language of, yes, love.

Notorious artist squat renovated into legal studios.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

A collection of fading fantasy tchotchkes lines this dirt road in the Colorado wilderness.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

This tiny museum's sizable collection is jammed into a former underground public toilet.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

A trio of hidden hot tubs takes advantage of Iceland's natural geothermal vents.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

Walk in the footsteps of the gods and straddle two tectonic plates.

Rising from the sea like a stone monster.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

Artists and musicians now rule over this former rail station.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.