It specializes in outsider art and artifacts of secret societies.

Former hotel turned into haunted playground.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

This medieval village/restaurant perpetually celebrates the year 1376.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

This expansive bridge in the Canadian wilderness was originally just built for friends.

This Ukraine alleyway has become its own little island of forgotten things.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

From mining complex to industrial exhibition, this museum once played a major part in the X-Files.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

Dothan, Alabama has been invaded by scores of anthropomorphic peanuts.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

The haunting concrete remains of a Nazi pebble crusher can still be found in this small French commune.

This magical museum celebrates the life and work of a seminal children's book writer (and occasional spy).

This massive underground salt mine now holds a sci-fi theme park in its depths.

The Icelandic Sea Monster Museum explores the area's history of aquatic cryptid sightings.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

The history of the traveling carnival is remembered by this sprawling collection of vintage wagons, games, and rides.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

Collection of nearly 500 concrete figures sculpted by the late Veijo Rönkkönen.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.