An underwater city for the dead.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A flying saucer has landed for good in the middle of a tiny Canadian town.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

Canada's subterranean Cold War museum has doubled as a movie set.

Legend says that this short Canadian tunnel still holds the dying screams of a girl who burned alive.

This natural sea cave hides a small wonderland of natural turquoise beauty.

A well-preserved network of cavernous tunnels have spent silent centuries removing Toronto's waste.

Launch site for nuclear war against Western Europe.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

Ever-growing collection of devils in art.

Sculpture garden of religious statues made it through Soviet rule.

A creepy statue of a hooded ghost hauls itself up from the water in a historic Lithuanian city.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

Lithuania's outdoor sculpture trail of wooden folk art.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Mysterious meeting place for UFO hunters near Area 51.

An eatery for UFO seekers on the Extraterrestrial Highway.

Annual celebration commemorating the 1965 sighting of strange lights in the town.

This abandoned boat sits on a nude beach, is shaped like a UFO, and is covered in graffiti.

Canadian centennial project designed to gather information about UFOs.

A museum dedicated to the alleged Roswell Incident.

A blacklight journey through a celestial art exhibit.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.