An ocean in the making, in the Ethiopian desert.

Ethiopia's "smoking mountain" is in one of the hottest regions on the planet and is home to two lava lakes.

The hottest place on the planet.

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

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

A stunning Catholic cathedral built by a curve-loving communist in Brazil’s newly created capital.

This public elevator links the lower city to the upper city of Salvador.

A 125-meter long "tribute to the Brazilian people."

Spanish religion mixed with local architecture has yielded a network of churches unlike any other.

A display of hand-built replicas of the legendary vessels used by Patagonian and Antarctic explorers.

Towns with a resource known as "white gold," valuable enough to fight a war over, now stand ghostly and empty.

What was once a unique system of urban elevators is turning into a mechanical ruin.

The ruins of a pre-Columbian fortress city so secure it held off the Spanish conquistadors for over 20 years.

The largest geyser field in the southern hemisphere is a spectacular sight.

One of the largest ancient geoglyphs in the world is a tall desert god used for predicting the weather.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

The remains of Uruguayan hero José Artigas lie beneath a monument in Montevideo’s main square.

This historic stadium was built to host the first-ever FIFA World Cup.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.

A desert that evokes the surreal.

Mountain of unimaginable riches that bankrolled the Spanish Empire, complete with its own underworld god.

This lake’s emerald green waters are a spectacular sight, but it’s not a great place for a swim.

This red lake 4,000 meters above sea level is home to rare flamingos.