"Brush with the devil in the 'other' Frankfurt."
On the easternmost frontier of Germany and separated from Poland by the Oder river is the other Frankfurt. An hour by train from Berlin this is the birthplace of Heinrich von Kleist, the C18th playwright and author of Prinz Friedrich von Homburg. Magnificent, red brick Gothic buildings dominate this old Hanseatic outpost. The Marienkirche church includes unique and incredible C14th stained glass windows depicting the life of the very normal looking antichrist and his pack of demons. Wander over the river to Slubice, part of Frankfurt until 1945, for lunch in Poland.
Google map: bit.ly/SpaC9I
Also the scene of a major Scottish and Swedish victory in the Thirty Years War.