In this pristine Ecuadorian hippie town, residents remain active well into their eighties and nineties.

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

A turquoise lake within a volcanic crater.

Abandoned mini-mansions that were once intended for affluent Bangkok families now sit empty.

This remarkably well-preserved Incan city managed to survive the conquistadores.

After an epic flood washed away its enslavers, this city has been part ghost town, part cultural wildcard for the past three centuries.

The first public library in the Americas has more than 45,000 books dating back to the 15th century.

Mysterious "dots" seen from a satellite in southeast Peru.

These ruined Incan mausoleum towers still bear carvings of sacred animals on their blocks.

A paradisical gorge with rapids, waterfalls, and wildlife whose raw beauty is the stuff of CGI movies.

These delicate ruins need more tourists to keep them from fading away.

An Archaeological Wonder of Peru, and the largest stone ruin site in the New World.

A mysterious pre-Incan ruin believed to have miraculous healing powers.

White llama terraces dazzle in Peru's "other Machu Picchu."

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

Lima’s Museum of Anthropology is lined with thousands of elongated human craniums.

The world's fifth tallest waterfall is a spectacular silver chute of water that cuts through the cloud forest in northern Peru.