This 19th century cyclorama acts like an analogue time machine to a different era.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

The beautiful, ornate weather station is the most popular geocache in Salzburg.

Mozart's skull may be held in this collection, but definitive proof continues to elude scientists.

The medieval network of canals hidden underneath the city is opened to explorers each year.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

A subterranean display of public art and architecture.

The scars of World War II are preserved on its walls.

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

The footprint of a frustrated devil in Munich's Cathedral.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

Commonly acknowledged as the only public monument to the Devil himself.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.