An encyclopedic collection of mammal penises.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Medicinal spa created with the discharge from a geothermal energy plant.

A huge musical instrument played by the ocean.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

A creepy tree with a local legend that inspired a nearby theme park ride.

One of the largest mechanical models of the solar system in the world.

This fantastical and eclectic English garden takes its inspiration from Egypt, China, the occult and more.

This crumbling folly looks like an enchanted left over from Middle Earth.

Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

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

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The first declared National Monument in the United States.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Most-visited and most-photographed slot canyon in the American Southwest.