A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

Located on 420 acres in the high desert, this spiritual center is dedicated to the "science of the future."

Commonly referred to as the most photographed Victorian home in the United States.

Hundreds of trees made from glass bottles make up this forest on Route 66.

A bigger-than-life pun that has become a beacon of altruism.

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

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

A modern day curiosity cabinet.

The unbelievably opulent home built for an infamous newspaperman.

Exotic feline breeding compound and conservation center.

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

One of the ghostly stops along Route 66.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

An eclectic trailer park retreat in the middle of the California desert.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

The largest drain hole in the world.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

The remains of a ruined mansion memorialize the 1906 earthquake.

In a city filled with Frank Gehry buildings, one stands out as one of the architect's weirder works.

Abandoned bridge hidden deep in the San Gabriel Mountains.

A 300-ship graveyard, with a few still visible at low tide.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.