An artsy hidden staircase leads to breathtaking views of San Francisco.

The remnants of an early automobile route across shifting sand dunes can still be found in the deserts of Southern California.

This wrecked ghost ship has been rusting on a Greek beach since the 1980s.

Unlike most arches, this geological oddity formed in a volcanic dike.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

A rock maze opens up to a panoramic viewpoint at an abandoned mine full of ghost stories.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

No Gordon Lightfoot song, only a barebones monument to greed.

A hobby born from insomnia has turned into a hangar full of objects that have been be-buttoned by the Button King.

North America's oldest authentic African Village.

Monument that stands 40 feet and weighs 1,000 pounds.

A model of a galactic embassy is hidden in plain sight along the highway, proposed by a UFO religion to find the aliens that created life on Earth.

This UFO landing strip was created by a charitable Wyoming city that was worried about residents of Jupiter.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

This set of rickety spaceships are prepared to give alien travelers a place to relax and go to the bathroom.

The UFO capital of Australia is the outback’s answer to Roswell.

This small town Texas cemetery is said to be the burial site of a UFO pilot who crashed in the 1800s.

This retro underwater observation tower would make the perfect lair for a sea-loving villain.

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

Walk 2,300 feet above the ground on the "Troll's Tongue."

Thousands of years of crashing waves gave this mushroom-shaped rock its svelte figure.

The world's shortest funicular ferries beachgoers a whopping 128 feet from clifftop to shore.

A trio of giant wooden megaphones turn up nature's volume in this Estonian forest.

The biblical sculpture honors those who lost their lives, homes and communities to the Chernobyl disaster.