The gorgeous murals at this open-air museum form the largest street art collective in Chile.

This museum covers 10,000 years of Pre-Columbian Latin American history.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

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

It took 82 years and four different plaques to finally get the story right.

A remarkable geological formation resembling a forest made of stone.

A gorgeous gilded tower houses what may be the world's largest collection of gin.

Absolutely no saxophones in the library.

Sound travels strangely in this underground whispering gallery.

A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

Stockholm's narrowest alley is barely over two feet wide.

A wooden street sign is the last remnant of this 400-year-old alleyway.

This centuries-old rooster survived a devastating fire.

Small Easter eggs are hidden in the ventilation holes of the city's newest trains.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Stockholm's tiniest statue is of a small boy looking at the Moon.

There are hidden patterns on the subway seats of some Stockholm metro cars.

What looks like a birch tree smushed between two pieces of glass often confounds commuters.

A king's bloodstained shirt is among the gruesome collection of artifacts displayed below Stockholm's Royal Palace.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

Stockholm's deepest subway station is also a stunning ecological wonder.

A statue that would be at home in Rome can instead be found in the heart of Norway's oldest city.

One thousand trees were planted in Norway to be used to print books a century from now.