This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

A natural dome made of volcanic glass in Inyo National Forest.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

The fossilized remains of ancient California redwoods.

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

This historic California cemetery holds the bodies of veterans of both the Civil War and the Donner Party.

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

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

The remains of a ruined mansion memorialize the 1906 earthquake.

The largest drain hole in the world.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

'Cause the fence start shaking, the earth was quaking.

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

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

A hotel and restaurant serving as the mecca of kitsch.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

A strange house built only at night, with rumored mystic inspiration.

A 140-year-old castle with underground caves hidden in San Francisco.

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

Every weekend, the parking lot of this Buddhist temple turns into a Thai street-food paradise.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

A common entry point to the Griffith Observatory trail holds its own wonders.

This California estate was either haunted by ghosts or the Marx brothers.