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

The depictions of slaughter are surprisingly detailed at this mysterious ancient site.

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

The mysterious "Candelabra of the Andes" could represent anything from a god's trident to a hallucinogenic plant.

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

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

This stone complex marks the urban center of a lost civilization.

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

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

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

An unexpected desert oasis in South America.

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

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

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

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

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

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

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

A network of ancient Egyptian tombs built into the cliff face along the Nile.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

Ozymandias’ time-keeping temple.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.