This marvelous work of outsider architecture is built into the cliffs of an Israeli beach.

One of the last free public hot springs is decorated with hippie art.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

The final resting place of a space program monolith.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Magical-looking cottages that inspired one of the most famous animated films ever.

Most famous work of one of Frank Lloyd Wright's sons.

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Its buzzing collection honors vibrator history.

The ghostly remains of an accidental sea.

A trash dump made beautiful by nature's power.

One man's homage to the sun continues to grow like a glass fractal.