A gateway to a mysterious network of underground tunnels.

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

The humble tomb of an Argentine general, hand-built by his son using stones brought down from the Andes.

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

A beautiful young girl said to have been buried alive in her coffin…

A mysterious architectural gem in one of the most elegant areas of Buenos Aires.

A vast necropolis where you'll find the elaborate mausoleums of Argentinian tango stars.

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

An underexplored, 130-foot tropical waterfall that you will have all to yourself.

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

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

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

A valley of unique erosion patterns lends to a view like nothing on Earth.

Bolivia's needle-like rock formations.

An ancient Incan convent on Lake Titicaca's Island of the Moon.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

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

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

Huge stone depressions which may have acted as an Incan agricultural experiment.

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

It took 82 years and four different plaques to finally get the story right.

This metal tower in the desert provides views of a handful of Nazca geoglyphs.