An abandoned car and strange wooden debris are among the scattered remains of the old sand and gravel quarry.

Boats must transform into railroad cars to navigate this Polish canal.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

The biggest pinball arcade in the world has over 600 pinball machines, and 300 arcade machines.

Couple's personal collection of pinball machines turned public pinball museum.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

Built for television, this statue now serves as an unlikely memorial to a fireman who died on 9/11.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

Abandoned Nazi train station turned underground astroparticle laboratory.

One of the deepest indoor swimming pools in the world.

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

This super steep hike ascends 2,000 feet in less than a mile.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

This historic railway museum may have lost its passengers but not its love for trains.

The world's largest indoor go-kart racetrack is hiding in Connecticut.