An intricately carved Viking church overlooks a glistening fjord.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

The final resting place of the father of modern biological taxonomy.

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.

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

A 200-year-old collection of medical paraphernalia in a historic house.

This chimerical bridge/tunnel appears to dead end right into the sea.

Copenhagen's celebrated theme park and gardens.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

Secret North Korean passage discovered below the world's most dangerous border.

The best place for scenic views of the DMZ and North Korea.

South Korea's largely symbolic, barely used gateway to the North.

A unique structure located on the grounds of one of five grand palaces that were built by the Joseon dynasty.

A studio devoted to keeping hundreds of unique Chinese arts alive.

The most famous location in China was home to whole dynasties worth of imperial rulers.

This smaller cousin of the Forbidden City has gone from ancestral sacrifice to tourist's whispers.

The embalmed remains of the communist leader lie within a custom crystal coffin.

An elaborate shrine dedicated to the four corners of the world unfortunately misses its mark.

This historic street in Quito is known for its seven stone crosses—and one presidential assassination.

A short volcanic hill in Quito doubles as a stellar observation point of an iconic statue.

Quito's historic, main square dates back to the 16th century.