Köln, DE
Römisch-Germanisches Museum explores the history of Roman history in Cologne and the surrounding area. The museum's tour guides are exceptionally dull and can make any visit seem like it lasted just as long as the Roman empire. If you can, wander around the museum by yourself.
Listen to the audio guide for Römisch-Germanisches Museum Free on WIP — starts by itself when you arrive, even with the screen off