Switzerland's oldest public observatory is an important part of the Zurich cityscape.

The oldest Jewish cemetery in Europe survived Hitler's Germany.

After local authorities changed the design, the building's architect, Le Corbusier, wanted nothing to do with it.

This memorial to a murdered empress took 20 years to design, then spent 30 years hidden away in storage.

It holds a fabulously designed tribute to astronomer Edmond Halley.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

Drink wine handed out through a window as part of an age-old tradition.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

A plaque on the base of this statue holds a bewitching design.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

At almost 1,000 years old, this is the oldest known door in all of Britain.

One of the world's largest swinging bells is a symbol made from the melted aftermath of war.

This little sun pays homage to a massive gate that once stood at this location.

A grumpy old water goblin guarding an old mill on the Devil’s Stream in Prague.

An ancient Greek monument and a Byzantine church coexist inside this cave.

In the summer of 1957, a massive architectural exhibition showed off the future of urban living in this German neighborhood.

A replica of the Liberty Bell rang daily from West Berlin's City Hall throughout the Cold War.

Remnants from a time before electricity.

A statue dedicated to the antihero of the Nibelung legend.

One of downtown Berlin's last reminders of its Communist past.

A socialist building dedicated to teachers showcases one of the largest Soviet mosaics in the world.

A former military hospital is now used to study and preserve artifacts of the Acropolis.

In 1857, the Mardi Gras parade tradition began at this intersection.

This pair of unsuspecting buildings are in fact the very first modern skyscrapers in Europe.