An ominous concrete cube cuts a dystopian silhouette atop this California mountain.

A house built from trash known as the poor man's Hearst Castle.

Two stone columns flank the grand Venice square, but there were supposed to be three.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

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

The oldest lawn bowling club in the United States.

A promotional sun clock on the site of San Francisco's great raceway.

This turn of the century masterpiece has a mysterious goaty interloper.

An overlooked and unassuming engineering marvel.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

Home to the "Circus" trees created by Axel Erlandson.

An "anarchical" no man's land, complete with garbage sculptures and a hobo-run "Landfillian Library."

The stately birthplace of California's statehood.

100-year-old shipwreck you can walk up to at low tide.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

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

The unbelievably opulent home built for an infamous newspaperman.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A massive volcanic plug is now a protected area that hosts a number of bird species.

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

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

This quirky roadside attraction dives into the many theories surrounding North America's most infamous hairy cryptid.

An emporium for the weird, creepy, rare, and just plain gross.