Hundreds of drawings left by the land's previous inhabitants remain mysterious.

Oldest building in California still in use.

A small medical museum with a recreated doctor's office.

This institution collects the history of burlesque dancing with a titillating collection of ephemera and pasties.

The sun acts as a key that only fits this giant keyhole twice a year.

Bug-devouring flora are the stars of a special wing of the glass conservatory.

The last of its kind in the country.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

Over one million bird-related artifacts await.

Water of undetermined depth has attracted rare fish and cult leaders alike.

Machinery left over from California's once thriving mercury industry now attracts artists and explorers.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

Only intact Ichthyosaur skeleton in the United States.

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

The unbelievably opulent home built for an infamous newspaperman.

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

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

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Nuclear waste dump site now an environmental sanctuary.

Back in the day everyone who was anyone played this historic western theater.

Hidden among the multi-million dollar mansions in the Santa Cruz hills is a sanctuary for troubled birds.

An extensive collection of ancient Egyptian artifacts and mummies.

Apple memorabilia in an undisclosed warehouse, hidden for undisclosed reasons.

From the Difference Engine to the Cray-1, all under one roof.