Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Ruins of a German Castle on top of a towering stone pillar.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

Northern Ireland's Brobdingnagian stepping stones.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

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

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

An Australian lake whose pink hue defies scientific explanation.

A 30-acre garden inspired by the principles of modern physics.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

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

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

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

The fairy tale castle of the "fairy-tale king."

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

Dramatic river bend surrounds a natural red-rocked pedestal.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

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

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

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

An eerie, derelict amusement park in Berlin.