High atop a Mexican rainforest mountain, this ancient pyramid once drew pilgrims countries away.

Monumental paintings, discovered in a Mexican cathedral in 1957, depict the deaths of some friars in Japan.

The conquistador's former fortress is the oldest preserved colonial building in the Americas.

A grand entrance to one of the world's smallest Chinatowns.

This museum houses two of Mexico's most impressive Aztec monoliths.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

Frida Kahlo's childhood home, now a museum of her life and works.

One of the oldest Christian churches still standing in the Americas, and almost certainly Mexico's oldest in continuous use.

In Coyoacán, a pair of coyotes crown a public fountain in reference to the ancient Aztec name of the borough.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

Iceland's tribute to its thankless civil servants.

Puffin enthusiasts flock to Europe's largest seabird cliff, which over one million birds call home.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

A little-visited waterfall in an otherworldly landscape.

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

The most powerful waterfall in all of Europe.

A stunning architectural yet functional feat, towering over Oslo.

This German fountain of a legendary apple wine-loving drink thief will spit on you.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

World's only telecommunication tower with a wooden pinnacle.