These spooky and unusual stone formations create an underworldly landscape.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

The largest stone moai on Rapa Nui.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

Plundered and left asunder by grave robbers, this ancient necropolis has been painstakingly pieced back together.

An unexpected desert oasis in South America.

The mysterious "Candelabra of the Andes" could represent anything from a god's trident to a hallucinogenic plant.

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

A battle between nature and architecture in the Cambodian jungle.

An ornate century-old elevator still connects the two halves of Bad Schandau.

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

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

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

A UFO-shaped event building originally intended to be a science museum showcasing the future.

The world's largest model of our planetary system.

A walkable map of the world, made from soil and stone by one man.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

This giant wire frame man sculpture is crouched in contemplation.

Live out your childhood construction fantasies in this one-of-a-kind gyrating hotel.

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

This unattributed sculpture in Amsterdam is hiding in plain sight.