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

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A winding path built in secret on the edge of the continent.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A huge musical instrument played by the ocean.

Elvis's own personal tropical hideaway.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

A giant telephone commemorates the last "crank" call ever made in the U.S.

New England's tallest light house stands on an island with a history of cannibalism and death.

The world's largest rotating world.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

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

Famously misunderstood wonder of the ancient world

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

The world's largest piece of copyrighted artwork.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

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

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

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

An antique cemetery in New York, this land is home to any number of famed corpses.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.