Ride the subways of yesteryear.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

This former Norwegian sailor's church is slowly being taken over by ramshackle robot musicians.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

A museum dedicated to the alleged Roswell Incident.

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

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

These expertly crafted, scientifically accurate glass sea creatures were once an international phenomenon.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

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

This Art Deco masterpiece has stood in for some of the most famous buildings in comic book history.

Go through the looking glass in Tokyo's Wonderland-themed shop.

A remote island holds what claims to be Scotland's smallest cinema.

This mother-daughter run curiosities shop is a beautifully odd mix of taxidermy and exotic plants.

Hundreds of skulls and bones at the largest skeleton museum in the country.

The natural history museum displaying the British bird collections and dioramas of Edward Booth, free of charge.

Home to the "Rat King" of Nantes and other wonders of the natural world.

Impossibly life-like natural history models created out of glass by a father and son.

Hidden beyond a kitschy giant beetle is this remarkably sprawling collection of preserved insects.

Three prestigious academic collections come together to create a world-class natural history museum.

The illuminating collection of L.A. street lights is run by the city and only opens one day per month.

A spiritual retreat in the heart of Los Angeles offers stunning gardens and a labyrinth to lose yourself in.

A Bibliophile's Dream.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.