A wonderfully kitsch bookstore the size of a supermarket.

Finnish lake, and scene of an infamous murder mystery.

Cryptic messages embedded in the New York City sidewalk.

Volunteer-run library dedicated to exploring five decades of activism history.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

A no-frills cinephile haven known for showing offbeat, underseen films.

A mysterious structure left behind on the Polish mountainside, sometimes called "Hitler's Stonehenge".

The top of society once luxuriated in this world-class hotel, which continues to impress, even in ruin.

This elegant arc of a waterfall marks a religious turning point.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

A Texas landowner spelled out his name with three miles of trees, a giant signature that's been used by NASA to evaluate satellite imagery.

Remember that scene in the Matrix, when Neo is in the big white room with all the weapons flying by? Well, this is what it would look like if he had wanted trees instead of guns.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

Deadliest lake in the world suffocated over 1,746 people in one night.

No one is exactly sure why over a hundred lakes have formed amongst the tallest sand dunes on Earth.

The room where Vincent van Gogh died.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.

Three bridges straddle a stream, one stacked upon the other.

The town of Argleton has a postal code and appears on maps and even real estate listings, yet it does not exist.

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.