A whimsical menagerie of devils, krampuses, satyrs, and other horned creatures.

A forgotten tribute to a South American hero hidden in a cluster of traffic islands.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

Made from trees and then abandoned, this fence is still growing along a path in Germany.

The oldest and smallest cemetery in Paris is only open to the public twice a year.

The secret medieval communication system will whisk your words above the noise of the crowd.

The world's tallest box hedge is found in a delightful garden.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

The narrowest house in America is seven feet of pure spite.

Crouch down, stretch tall, and be sure to flail your legs to pay homage to the Monty Python classic.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

An impressive collection is dedicated to the legendary beast.

An abandoned railroad tunnel forgotten by time awaits inquisitive hikers.

An unrealized Taoist palace left abandoned in a Houston suburb.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

When it came to designing his own small office building, the eccentric architect wasn't afraid to show the world what he could do.

This gnarled old tree supposedly sprouted from seeds kept in the pocket of a 16th-century Spanish sailor.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

The roadway bend where highway painters practice their craft looks like expressionist art.

What looks like missing grout is actually an old pub's peephole.

Left by the Devil, an ancient quarry or just plain old erosion, this enigmatic rock pillar rises 28 feet from the hillside.