Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

The abandoned remains of this Victorian brewery hide crumbling bowling alleys and rusting industrial gear.

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

A slice of central Asia in the middle of Berlin.

Sleep snuggled in a sphere suspended atop the forest canopy of Vancouver Island.

A floating McDonald's built for Expo '86 is now a derelict relic on Burrard Inlet.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.

This crumbling folly looks like an enchanted left over from Middle Earth.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

An 18th century monument regularly tagged with unsettling graffiti referencing a 1940s unsolved murder.

Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

This historic abandoned train station looks like a stop for ghost trains.

The granddaddy of English geoglyphs dates back to the late Bronze Age.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

Rare and wonderfully wormy cadaver art captured in brass for centuries.

A rotting air force base is now home to rare birds and scarce plants.

In pastoral England, a plaque marks where an imaginary community addressed the problem of combat mortality.

An abandoned tank sits in an empty London lot as a symbolic middle finger to local city planners.

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

This ruined folly was originally built to honor a failed American state that would have become "Westsylvania."

The elegant structure of this 19th century railroad bridge creates an illusion of infinity.

This tunnel entrance is built to resemble a grand castle but no one is quite sure why.