Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A 140-year-old castle with underground caves hidden in San Francisco.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

World's largest collection of serial killer artwork and other macabre exhibits.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

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.

This abandoned boat was left in place thanks to its rotting beauty.

The longest burning light bulb in the world.

Neither Spanish settlers nor anyone since has been able to tell who built these strange California rock walls.

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

A huge musical instrument played by the ocean.

A psychedelic labyrinth on the San Francisco bay.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

Where the polar bear watches over everything, and every drink is a double.

The timepiece that exonerated a labor radical accused of a parade bombing that killed ten people.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

The haunting ruins of Jack London's dream house.

The smallest country in the world.

340 bicycles, 65 feet high.