Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

The artist and New York City icon lived, worked and died in this converted carriage house owned by another iconic artist, Andy Warhol.

A living archive of urban activism and space reclaimed.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

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

A winding, blood-red tunnel of hardened lava navigable by foot.

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Sloth rehabilitation center in the jungle of Costa Rica.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Eighteen miniature death-scene dioramas.

A hand-built folk art installation covered with messages of God's love.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

World's largest collection of serial killer artwork and other macabre exhibits.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

On Japan's Tashirojima Island, cats are king.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.