Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

The Uros people live on floating reed islands in lake Titicaca.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

An epic sculpture depicting a wagon and straining oxen.

Abandoned bull fighting ring, slowly falling apart in Uruguay.

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

These mammoth-yet-narrow crevasses in the Earth are perfect for taking an otherworldly swim.

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

Mysterious and ancient carved standing stones.

A bright little alley in La Boca is a part of tango history.

Massive rock sculptures formed during the time of the dinosaurs still stand undisturbed.

Once swallowed by flood waters, this village has emerged as an eerie shadow of its former self.

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.

This plaza at the end of the world teems with monumental tributes to a problematic history, and laser discs.

A tower devoted to — and modeled after — the Divine Comedy.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

105-foot wide giant metallic flower blooms anew every day in the heart of Buenos Aires.

This historic, palatial theater is now one of the world’s most beautiful bookstores.