California's own majestic geyser is powered by a subterranean volcano.

The fossilized remains of ancient California redwoods.

A tribute to the life and work of the beloved "Peanuts" cartoonist.

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

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

The fairy tale castle of the "fairy-tale king."

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

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

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

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

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

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

This private residence was the template for one of the most beloved television homes of all time.

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

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

This black shoreline is made up of exploded lava particles.

These ancient sacred grounds granted amnesty to those who managed to reach them.

A controversial memorial at the place where Captain Cook met his violent end.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

The celebrated eyesore created by starry-eyed sweethearts.

Discover for yourself what Herb Caen referred to as "the best kept secret in the Bay Area."