Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

Abandoned medieval hill town.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

A roadside collection of over-sized iron creations that are a bit more macabre than most.

One of the greatest maze designer’s greatest mazes.

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.

Home to the "Circus" trees created by Axel Erlandson.

Strange beasts lurking in a garden are all that remain of a quirky, short-lived theme park.

Meet manatees face-to-face at this zoo for native species.

A ruined hotel with an unlucky history and an eerie present.

This dark, quiet forest on the outskirts of San Diego is dense with rumor and lore.

An urban laboratory.

Whimsical artist house in the New Jersey woods.

Ten 25-foot-tall, beehive-shaped kilns, abandoned in Death Valley.

Despite being made of a seashell mortar, the crumbling remains of this historic Florida mill are still standing.

A quirky collection of figurines backdropped by city views is hidden next to a popular restaurant in the Hollywood hills.

A home made entirely from scrapped, reclaimed and recycled material in Whitman County, Washington.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

A blacklight mini-golf fever dream pays tribute to the iconic rock band.

Even in death, he's still your huckleberry.

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

Community owned and operated, this property is home to a diverse set of nudists.

Secret Manor, a house full of legends, the least of which is the haunting of long-deceased ladies of pleasure.

The abandoned coal loading dock is a canvas for unsanctioned art.