One of the most remote and isolated villages on the Arabian Peninsula.

A mesmerizing reservoir nestled at the heart of a pre-Islamic Yemeni village.

A city built from mud and known as the "Manhattan of the desert."

The inhabitants of the world’s largest wetland have learned to navigate its dramatic seasonal changes.

Every October, one of the largest migration of mammals in the world thunders through Boma National Park.

The best-preserved example of a unique structure in Nubian architecture.

Crumbling pyramids and temple ruins stand within the shadow of this sacred butte.

These Nubian pyramids are strange and unique, even by pyramid standards.

The longest sea beach in the world can be found on the southern coast of Brazil.

These small, spectacular monkeys are making a comeback after deforestation destroyed much of their rainforest habitat.

This unique bird reserve sits within an important fragment of Brazil's Atlantic rainforest.

This neo-Gothic monastery offers a rare chance to witness the unique maned wolf right up close.

High plateaus and beautiful waterfalls frame this ecologically significant nature preserve.

Deep below the dry landscape of Bahia, a cave with intense blue water to float in.

The haunting peak of an old church is all that remains of a drowned Brazilian city.

A faux desert landscape in the middle of the jungle that sprouts oases during the rainy season.

These termites have an large and deadly abode—impressive by day, dazzling by night.

Part of one of the largest flooded cavities on the planet, and littered with prehistoric animal bones.

After millennia of erosion by sand and churning water this Brazilian valley now looks like a lunar fantasy.

Mineral springs believed to hold therapeutic properties draw in visitors from all over.

The inspiration for the Patagonia Clothing logo, Cerro Fitz Roy turns pink at sunrise.

Stenciled handprints and wall paintings dating back 10,000 years, some of the earliest forms of cave art.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

This stunning mass of ice spans 121 square miles and is still growing.