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

A century-old shot ball factory tower is open to the public once a year.

Four-story slides send people whizzing through the math department at this Munich university.

This contentious squat has stood through fire, violence, and government intervention as a hotbed of leftist protest.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

This concrete residential area doubles as an open-air gallery.

It's good luck to be mocked by this monkey.

This old wooden funicular railway leads to a cemetery in the forest.

Solar observatory doubles as a daring display of Expressionist architecture, much to Einstein's chagrin.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

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

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Twisted buildings adorn the banks of the Rhine river.

King Ludwig I's collection of beautiful women.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

A subterranean display of public art and architecture.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

This lurid German fountain plots the sad course of marriage from dating to death.

Reminders of the Battle of Berlin still scar the railway.

Model Trains and Much More in Hamburg.

Metro station with a claim to rock n' roll fame.

One of the world's heaviest musical instruments towers within a popular urban park.