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

A fashion designer's dazzling world of Japanese collectibles is hidden in a warehouse downtown.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

The abandoned personal amusement park of the King of Pop.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

The quiet canyon has a tumultuous history involving a doomsday cult.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

Acres of natural wonders left behind by a socialite-turned-gardener.

San Francisco Bay's ghost town.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

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

One of the ghostly stops along Route 66.

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

San Diego's most historic and haunted home.

The largest drain hole in the world.

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

The site of murders and Satanic cult gatherings.

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

Abandoned bridge hidden deep in the San Gabriel Mountains.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

An unfortunate geological resemblance to Satan has labeled this Pasadena gorge as a passage to the underworld.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

The final resting place of a space program monolith.