A flooded Mexican cave that hides a river beneath the water.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

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

This delicate museum is devoted to the art and industry that once supported Cape Cod's oldest town.

The world's largest piece of copyrighted artwork.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

Many of the murals covering this sleepy Florida town hide some sort of intentional error.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Nevada's largest cactus collection stands outside a candy mogul's small factory.

A miniature view of the park, caught in time.

A small section of Boise, Idaho maintains the unique culture and traditions of the Basque people.

Radioactivity still cause for concern at this urban explorer's paradise.

Faceless white figures loom over the city from the rooftop.

The only remaining place where you can play this century-old game for cash.

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

The body of one of the world's most famous outlaws is covered in cement and iron to prevent it from being stolen.

Electrical pylon in the shape of Disney's beloved mouse.

The so-called "Statue of Liberty of Los Angeles" is on a one mutant mission to keep L.A. weird.

Appropriation-friendly collection of books, periodicals, and more.

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