The silly symbol for an underground protest group is now scattered around the city.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

Special benches that play Chopin's music are scattered throughout his native city.

An impressive monument to Poland's independence.

At Bank station, the tunneling shield that built the original Waterloo & City line tunnel is hiding in plain sight

A historic fire call point.

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

A monument to the man who almost killed Hitler.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Macabre astrological automaton clock dating to the late 1400s.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

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

What looks like a suicide in progress is actually a statue of Sigmund Freud.

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

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

An ornate private entrance to the Vienna subway built specifically for the emperor.

Sturdy scales are a surprising thing to find in a modern European city.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

Designed as a reminder of one of the darkest moments in Austrian history.

A gruesome and mysterious ancient sculpture of a pagan deity from the Roman occupation of Celtic Britain.