The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A smoke stack so large, the Washington Monument could fit inside!

A 6-mile-long lake created by an apocalyptic seismic event and the deadly chain reaction that ensued.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The mayor made the declaration in 2004.

This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

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

The magic's in the hole!

Semi-recognized center of the world, with many oddities.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A collection of memorabilia from the Beat era in the back of a San Francisco bookstore.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

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

Offering commanding views of the California coastline, this restaurant was a hub for the artists and bohemians of Big Sur.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

The ghostly remains of an accidental sea.

Version of the French Riviera destroyed by the sea.

What is the Thing?

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

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