With Berlin being one of the major tourist destinations in the world, there is no great need to do anything else with your time but to explore the city. However, if you want to explore the surroundings of Berlin you will have lots of options.

Places such as Teltow, Strausberg, Velten, Bernau, Erkner, Rudersdorf, Konigs Wusterhausen and even Falkensee lie within 40km of Berlin, so there are plenty of nice getaways.