Mysterious glowing orbs float through the desert night.

A Prada store in the West Texas desert that is never open for business.

A trio of colossal statues spread across a Dallas neighborhood chart the emergence of a giant robot born of a locomotive and spilled gin.

This downtown Dallas art installation is always on the lookout.

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

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

The largest arcade museum in the world chronicles the golden age of video games which ended promptly in 1987.

A unique geological area spiked with wind-carved rocks that resemble teepees.

A museum dedicated to the alleged Roswell Incident.

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.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A century after his death, this covered bridge still calls to mind the plein air painter who loved it.

The king of U.S. high points towers over every other peak on the continent.

Breathtaking and huge 430 year old maps of Italy.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Now home to a drinking establishment, this building has a macabre history.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.