This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

The largest mosque in Germany.

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

If the tunes of antique organs and musical marionettes don't intoxicate you, the draft beer certainly will.

A top-secret bunker now turned museum, is an eerie look at what life would have looked like in the event of nuclear war.

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

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

A ruined castle stands atop a hill surrounded by dragon lore.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

Thousands of flowers create enchanting pink tunnels over the city streets.