The neighborhood shop is a sort of tiny cactus museum full of exotic specimens you can take home.

Nancy Thompson's Home from "A Nightmare on Elm Street."

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

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

Stroll the grounds built by murder, suicide, and dirty oil money at one of Hollywood's most filmed mansions.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

The biggest pinball arcade in the world has over 600 pinball machines, and 300 arcade machines.

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

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

Travelers exchange letters with woodland creatures at this mini post office.

A "Titanic" superfan changed his name to Jack and set up this strange shrine to the blockbuster, complete with Korean food and Tarot readings.

The final resting place of a space program monolith.

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

An inconspicuous footbridge beloved by San Diego locals.

Abandoned bridge hidden deep in the San Gabriel Mountains.

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

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

Olfactory delights in San Francisco's Botanical Gardens.

Its buzzing collection honors vibrator history.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

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

This quiet chapel was central to a community of settlers who reclaimed an abandoned fort.

Make a wish at what might be America's only Catholic shrine to a sinner.