A majestic mansion designed in Mughalai style, complete with a turquoise onion dome.

This medieval manor house was equipped with secret compartments for hiding priests.

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

In Portugal, a secluded stretch of untouched natural beauty hides at the bottom of a steep hill.

A refurbished locomotive from a bygone era in the middle of the Jordanian desert.

Concentrated around the Dead Sea, these surprising canyons are filled with coursing water, fish, and even crabs.

An alien landscape of chalk-rock in the Egyptian desert.

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

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Sloth rehabilitation center in the jungle of Costa Rica.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

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

The cluster of boulders near Fort Irwin is covered in military insignia.

Where NASA's satellites and rovers phone home.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

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.

Rippling sand dunes frozen in the Arizona rock.

Home of the International Space Hall of Fame.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

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

The world's only facility where orphaned mountain gorillas are cared for.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.