The last moments of the ill-fated Pompeiians, frozen forever in plaster.

A unique underground structure dating back to the 1st century BC.

This plaza is home to a number of works, including Montpellier‘s own Arc de Triomphe.

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.

King Ludwig I's collection of beautiful women.

A small square plaque marks a failed assassination attempt that could have changed history.

A fearsome dragon clings to a corner of Munich's city hall.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

Museum dedicated to the terror regimes of Hungary.

The metal leaves on this tree are engraved with the names of Holocaust victims.

The massive white mound and accompanying water terraces are a striking geological oddity.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A church of bones, decorated with 40,000 human skeletons.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

The second-longest continuous wall on the planet protects a hidden secret in the deserts of India.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.