Massive prehistoric mammals used these stones as oversized scratching posts.

Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.

This diner's a kitschy dreamland for anyone whose heart is stuck in the 1980s.

This corn maze so big you may want to pack a lunch, and possibly a flaregun.

A 300-ship graveyard, with a few still visible at low tide.

The United States' first transcontinental automobile road came to its end at this spot in San Francisco's Lincoln Park.

This airfield played a key role in both World War II and the Cold War.

Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

The haunting ruins of Jack London's dream house.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

The longest burning light bulb in the world.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

Here, visitors can swing with the waves of the Pacific Ocean.

France's most famous cemetery, with some of its most curious tombs.

To find the "unicorns of the deep" you've got to go downstairs.

This giant wooden treehouse within a sprawling garden has its own eatery.

A cozy bookstore is tucked within an old gold mine shaft beneath the cafe and ice cream shop.

An abandoned Cold War missile radar site.

A lion given to the prime minister somehow got stuffed and sent to Florida.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

Make your reservation to have coffee with some kitties.