The colonial city's social history is reflected in its fanciful door knockers.

Perched atop the highest hill in Cartagena, this 17th-century convent offers spectacular views of the city.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

Haunted by its violent past, this colonial bastion was the largest Spanish military installation in the Americas.

Thousands of volcanic rocks carved 1,000 years ago.

This 16th-century monastery was founded to cloister the daughters of wealthy local families.

A Christian monastery stands on what was once a holy Incan temple.

The elaborate crypt where Peruvian heroes of the War of the Pacific were laid to rest.

Enormous array of antennae fill a desert valley.

These overlooked ruins give an intimate look at the Inca Empire's urban planning prowess.

The sophisticated hydraulic system of the Nazca civilization.

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

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

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

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

The remains of what was the most important religious complex in coastal Peru for over a millennium.

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

An unexpected desert oasis in South America.

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.

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.

This public art pays homage to the baseball legend and civil rights icon and his time in Montreal.

A patch of contaminated land reclaimed as a scrappy sculptural oasis.

This permanent exhibition of commercial signs aims to preserve the cultural heritage of the city.