Stunning examples of Russia's 18th-century wooden architecture.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

Oldest building in California still in use.

San Diego's most historic and haunted home.

Only hotel where you can legally launder money.

San Francisco's oldest operating hotel, with a Victorian atmosphere and a "haunted" fourth floor.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A modern day curiosity cabinet.

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

Medical and zoological curiosities for sale.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

Established in the '60s, a family-owned tropical drink bar founded by Ray Buhen, bartender to the stars.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

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

The legendary building that needed ghostly approval before being built.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Historic funicular railway, believed to be the shortest railroad in the world.

The most confusing clock in New York.

Avoid gangster interaction while window-shopping.

Baroque celebration of the end of the Great Plague of Vienna.

This bridge was constructed from the rubble of the infamous Bastille.

Notorious artist squat renovated into legal studios.