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

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

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

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.

An unexpected desert oasis in South America.

The little bear in the "funny kind of hat" has made his way from London back to Peru.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

Astronomical observatory above Lake Titicaca.

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

Museum dedicated to the sacred leaf of the Andes.

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

Bolivia's needle-like rock formations.

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

Death road of Bolivia.

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

Largest site of dinosaur footprints ever found includes more than 5,000 tracks.

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

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

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

Hand-made memorials and a wish-granting murderer lie within this seaside pauper's cemetery.

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