From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

Puppet theater and museum holding a collection of more than 300.

An abandoned meat mecca now serves as an excellent locale for urban exploration.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

An eerie, derelict amusement park in Berlin.

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

Like something out of a bad acid trip, this Ukraine hallway has been covered in hallucinatory phantasmagoria.

Come stay at a live-in art installation.

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

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A five-story homage to tea times past.

Banksy gives themself artistic license with this piece of London street art.

The largest clown school in Britain offering accredited degrees.

A building that survived WWII, possibly on the virtue of its name alone.

If your school was decorated with trippy graffiti, served ambrosial coffee, and was frequented by mimes, it might have been similar to this groovy cafe.

A historic house left in "dramatic still life."

A toy store with a century-long history preserves the craftsmanship of playthings of the past.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

The anatomical-pathological collection of a man who changed surgery.