San Diego's most historic and haunted home.

North America's largest accredited model railroad museum.

The show's fictional Korean medical camp was created in the Santa Monica hills.

Hidden above a drug store on a nondescript corner of Lincoln Heights is a private clubhouse for intrepid explorers.

Executed in 1401, Exhumed in 1878, Stolen in 2010.

Where Aleister Crowley taught magick in "La Chambre Des Cauchemars," his "Chamber of Nightmares."

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

Berlin's beloved bear is immortalized at the Museum für Naturkunde.

Cave shrine on Monte Pellegrino.

Thousands of well-dressed mummies below a monastery.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

This traditional garden in the San Fernando Valley doubled for Star Fleet Academy, and is irrigated entirely by wastewater.

This star-studded Old Hollywood restaurant is where fettuccine Alfredo made its United States debut.

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

Contemporary art inspired by natural history and science drawing on ancient techniques in a modern world.

Over one million bird-related artifacts await.

One man's homage to the sun continues to grow like a glass fractal.

The "Seinfeld" diner.

Dedicated to the art of hunting, with juxtapositions of contemporary art.

A glittering South Asian anomaly in a wealthy Los Angeles suburb.

A modern mechanical planetary system, part of a 10,000 year clock.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.