A series of haunting wooden totems are hidden in the woods surrounding a German environmental center.

A typical crusty old museum this isn't.

1898 German railroad depot museum with working engines, steam train excursions, and hands-on displays.

Crop circles inspired this whimsical garden in Germany.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

San Francisco's newly reopened hands-on science museum.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

Olfactory delights in San Francisco's Botanical Gardens.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

A museum befitting the city responsible for supplying the majority of the world's LSD.

Its buzzing collection honors vibrator history.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

The history of radiation is on safe display at the foot of a radiation science laboratory.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

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

America's most famous piece of self-built architecture.

A museum wholly devoted to juvenescence.

Following the trail of an old metro line, this scenic path is haunted by a creepy spriggan statue.

London's old-school healing garden.