After retiring, Gary Pendergrass turned his yard into a wonderland of outsider art.

These jagged limestone blades cut out through the canopy of the jungles of Borneo.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

The highest waterfall in Italy is only "turned on" five times a year.

A giant owl named Rocco oversees mythical woodland creatures along these charming mountain trails.

Eclectic architecture in the woods of New York.

What started as a way to address damp basement walls turned into a house filled with intricate hand-carved designs.

This contemporary art museum is filled with other, smaller museums, which feature work from artists primarily in the Pacific Northwest.

A high point in Vancouver kitsch.

This museum is home to 22 panes depicting skeletons dressed in colorful garments.

Even Henry David Thoreau found this glacial pothole irresistible.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

An abandoned observatory in the middle of the Illinois prairie.

This work of engineering is imbued with elegance and ingeniousness.

A narrow opening between the mountains of the Amalfi Coast creates a scenic hidden beach.

A small sculpture garden that provides a microcosmic representation of California.

Building owners can take out tiles for free at this repository for historic building materials.

A 40-foot waterfall flows into this unique natural swimming hole.

A self-built castle made by a mysterious man.

This collection of vintage signs reflects the long and colorful history of this Arizona town.

In the mountains of West Virginia is this perfectly preserved Art Deco train station.

At this gas station in the middle of the desert, a convenience store has been carved directly into the rock.