This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

From Japan to Italy, this California park explores the world's cultures through their gardens.

A Cuban artist reclaimed his impoverished neighborhood as a dreamy folk art kingdom.

A kaleidoscopic warehouse-maze of handmade neon signs.

This kitsch eatery is chock-a-block with bric-a-brac.

An unreal vintage shop that wears its dadaist influence on its zombie fish.

Featuring a casually threatening atmosphere along with dessert and coffee to die for.

The world's only museum devoted to the wonders of fluorescence.

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A collection of memorabilia from the Beat era in the back of a San Francisco bookstore.

The fantastic architectural models of a French traveler.

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

A psychedelic labyrinth on the San Francisco bay.

A huge musical instrument played by the ocean.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

A hand-built folk art installation covered with messages of God's love.

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

Enormous lake at the bottom of a unique cave system.

This abandoned amusement park was built on a site with a dark history.

Rainbow-hued local gem in Venice.

Beautiful Victorian buildings from L.A.'s forgotten architectural past.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.