San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

Golden Gate Park's historic collection of plants.

This shop and studio is dedicated to the art of the book, from letterpress to bookbinding.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

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

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

A fake Transylvanian castle houses a cathedral of antlers.

Museum dedicated to the terror regimes of Hungary.

Once the home of a hermetic monk, this cave now houses a small church.

A Japanese concept restaurant that feels like a party thrown by the monsters in your closet.

Shrine to Japanese water-goblins, complete with their preserved body parts.

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

The only rotating bar in New Orleans has been slowly spinning since 1949.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

Early habitat dioramas and home of the elusive gaff, the skvader.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

The oldest surviving botanic garden in the United States.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A huge musical instrument played by the ocean.