A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

A haunting collection of the vanished and disappearing natural world.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

This massive library holds what was once the largest book collection in the world.

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

Abandoned railway line circling the city of Paris.

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

Stay overnight in the world's most sleekly designed rabbit hole, free of charge.

An isolated, rusty phone booth commemorates Iceland's first international telegraph cable.

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

A modern artist's primitive stone faces and unique rock instrument join Iceland's terrain with its history.

This black church sits alone among a field of lava rock.

These concrete domes were installed on an Icelandic bluff to honor a very specific musical tradion.

This modern monument to pagan belief looks like it was transported straight from ancient times.

The Icelandic Sea Monster Museum explores the area's history of aquatic cryptid sightings.

Whether you're up or down, the Elevator Museum is worth a stop.

New York City's first Modernist house.

A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

Mysterious 500-year-old tapestries depict a unicorn hunt.

A self-made museum in Queens, New York continues to display the work of a sculptor known for paving his own way.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

The legendary court where emerging basketball players gain their street cred.