A huge musical instrument played by the ocean.

Home to one of the world’s largest collections of model yachts.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

A 1920s home transformed into an immersive art experience, where every room is a portal to another realm.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

A pair of mutilated bronze octopuses slump at the base of the monument honoring California's admission to the U.S.

Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

Join the circus for a few lessons to learn clowning, acrobatics, and Chinese contortion.

A promotional sun clock on the site of San Francisco's great raceway.

A modern mechanical planetary system, part of a 10,000 year clock.

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

After the parade, students throw their beads on the tree hoping for good luck on exams.

A house of courtship where the Jazz Age's most storied lovers got their start.

Introducing the Green Fairy to her fawning masses.

Taxidermied cartoon heads, unseen illustrations, and famous characters all reside in this small gallery space.

A haunting, yet lovingly hand-hewn potters' field full of graves that flood with each heavy rain.

Legend says a primate-like cryptid prowls this otherworldy sliver of the Louisiana bayou.

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

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

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

A self-built castle made by a mysterious man.

The historic “pink house on the hill” is an architectural gem that now serves as a center for water conservation.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.