The most perfect way to spend a Sunday in Berlin is to have a leisurely, 3 hour long breakfast, go to a flea market and to then have more tea or coffee and to take a long walk.
We did exactly that today. First we went to the indoor flea market, Sing Blackbird and then had lots of fresh mint tea. With the city being full of Christmas markets and decorations, as well as Glühwein and roasted chestnuts being available around every corner, it is feeling very christmasy. It is getting bitterly cold now, -2 degrees today and on Thursday it will drop to -9. I think Glühwein was invented to keep your hands and body warm during cold days like that.