Rippling sand dunes frozen in the Arizona rock.

Adobe ruins punctuate the beauty of an 800 foot canyon carved by the Canadian River.

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

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

A clear blue swimming hole with hidden caves, still unexplored.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

This massive chapel in the middle of the Indonesian forest is both haunting and fowl.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

The burial grounds of a secret society includes fences topped with fake Tesla balls.

A rugged lava field dotted with molds of the ancient pines that were growing when the volcano erupted.

Colorful lights and mirror-like brine pools create trippy illusions within the historic mine.

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

Some say this medieval church is where the poet Dante married his wife and also met the love of his life.

A quirky assortment of musical marvels from around the world.

More stones than Stonehenge, all scattered within a windswept landscape sure to enchant 'Outlander' fans.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.

What was once the largest mine in North America has left behind a hollow hill filled with bright blue waters.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.