Crumbling necropolis set high above Fez.

This stucco building in North Africa was the first American-owned property on foreign soil.

This breathtaking island on Rwanda’s Lake Kivu is a haven for thousands of fruit bats.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

The fifth-longest natural arch in the world, and the longest outside China.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

This quiet park's strange sedimentary spires were named after Kodak's color film.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A tunnel with windows, so you don't miss out on the impressive views.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

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.

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

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

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

Legends surround this jagged rock formation in the New Mexico desert.

The only road through the heart of Glacier National Park.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

This popular tourist cave was ignored for almost 200 years before being mined into an attraction.

A sanctuary for sickly, stray, or wounded donkeys.

A living antique aviation museum in the historic town of Red Hook, New York.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The poet's been ambling through these New York woods since 1940.