Two very green residential towers cleaning the air in one of Europe's most polluted cities.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

The oldest operating pharmacy in the world features 800-year-old recipes.

An enormous and lavish Gothic church in Czechia.

A surreal statue honoring Prague's favorite literary son.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

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

The hidden lair of an alchemist rediscovered in a 2002 flood.

Macabre astrological automaton clock dating to the late 1400s.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

A statue dedicated to the antihero of the Nibelung legend.

This concrete church spent a period of its history as a World War II bunker.

One of the largest busts in the world celebrates the German city's erstwhile namesake.

Largest illuminated advertisement sign in the world.

These tenacious 14th-century towers defied demolition and are now a fairytale vacation rental.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.

On the highest peak in the Harz Mountains, science and the occult faced off in a failed attempt to turn a goat into a boy.

This futuristic German television spire is actually the world's largest digital clock.

Take a walk in a recreation of ancient Rome.

In this brilliant blue spring in Germany, legend has it that a sad mermaid learned to finally laugh.

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

This strange building looks like a medieval fortress crashed into a 1960s Brutalist office block.