On 13 December regional trains return to the Stadtbahn, the RE3 and RE5 go hourly and the S1 and S5 lose trains in the rush hour. Three weeks later the VBB fares rise. Here is what changes on your line, from which date, and which tickets to buy before January.

The treetop walk over the ruined sanatorium changes its hours almost every week until February. Here is what is open on your date, which train gets you there while the RE7 starts at Charlottenburg, and how to get inside the buildings legally.

Dessau has the Bauhaus Building, the Masters' Houses and the Bauhaus Museum within about 2 km of the station, but the weekday, the season and a rail closure decide how much of it you see. Here is the day that works.