A complex and beautiful system of rice terraces covers a million acres over the mountains.

Rippling sand dunes frozen in the Arizona rock.

Unusual rock formations eroded into a landscape of stone beasts.

An ancient forest of the Paleocene Age turned to stone.

These mammoth-yet-narrow crevasses in the Earth are perfect for taking an otherworldly swim.

Extraordinary rock formations in open Peruvian fields.

Hundreds of hidden passageways weave through the old quarters of Lyon.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

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

Modern-day cave dwellers carve elaborate homes out of volcanic debris.

Stroll through Welsh history in a village of reconstructed structures.

Abandoned castle was once a grand example of Russian privilege, built exclusively to win a frivolous bet between noblemen.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

Obelisks and stone pineapples in the Irish countryside.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

An emerald-green grotto just a short trip from Austin.

65 million-year-old chalk outcroppings mark the end of the Jurassic Coast.

Bolivia's needle-like rock formations.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.