Serbia's master of striking memorials erected a forgotten, hidden gem in the hills outside a tiny village.

A park full of outsider art, created by college students studying outsider art.

Defying all odds, this lonely little tree found a home on a log sticking out of a Canadian lake.

In the middle of the desert, miles from any human life, sat an anomalous pay phone that still magically answers your calls.

Even Henry David Thoreau found this glacial pothole irresistible.

The remains of a World War II munitions factory still haunt the fields of this Twin Cities suburb.

Crumbling ruins mark the site of a couple's grisly murder in the woods.

A once-glowing grotto at the bottom of Waikapalae Wet Cave.

No one knows who's responsible for decorating this tunnel with stuffed animals, but the people love it enough to protest their removal.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Legends of time travel and magical woodland creatures bolster the natural charm of this verdant sanctuary in the midst of Moscow.

This overgrown Illinois water park offers a whole new type of adventure.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

This glamorous old building is said to have inspired the Tower of Terror.

The ghostly remains of an accidental sea.

World War II-era Nazi compound nestled in the Santa Monica hills.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

Unusual British home built to disguise a water tower.

A village on the east coast of England that has almost completely eroded into the North Sea.

The UK's oldest theme park slowly slips away.

This ancient bridge made of stone slabs is said to be reserved for the devil to sunbathe.

One fisherman has used his love of pebbles and shore to create a crazy garden of rocky art.

Half-drowned wooden stumps and stone blocks are all that remain of a Victorian landing that was destroyed by storms.