A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

A pink cottage covered in hearts served as a haven and a resting place for LGBTQ activists.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The world's largest collection of witchcraft regalia.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

Hot springs monkey spa in the middle of Hell's Valley.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

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

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Medicinal spa created with the discharge from a geothermal energy plant.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

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

This faux-seedy Japanese arcade is made up to look like a maze of alleys straight out of a cyberpunk dystopia.

A big museum full of little worlds.

Hidden on the urban banks of a Manchester river are a series of abandoned waterside industrial sites.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.