Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

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

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

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

A peculiar forest that was handcrafted for government experiments.

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

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

A symbol of Texas pride.

This mill has survived a tumultuous past to still produce flour and cornmeal.

This Birnam-based garden honors the legacy of 19th-century children’s book author Beatrix Potter.

Described by William Wordsworth as a "World of Wonder."

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

The discovery of this Neolithic settlement, which contained a Stone Age "cathedral," threw archaeologists for a loop.

Enter the world under the hill at this ancient UK burial chamber.

The sign marks one of the endpoints to mainland Britain's longest overland travel route.

The location of this historic castle was inspired by a donkey.