Abandoned amusement park in Berlin - ferris wheel still operates via wind power only and screams as it turns. Eerie.
My favourite beer garden in Tiergarten
What to do in Berlin - 5 things not to miss in Berlin
Top 20 free things to do in Berlin - Lonely Planet
Prinzessinnengarten in Kreuzberg, Berlin. Another cool place to hang out with a little cafe, restaurant and garden. Often there are weekend activities and even a Christmas market.
10 of the best breakfast and brunch spots in Berlin http://www.guardian.co.uk/travel/2011/aug/17/10-best-breakfast-brunch-berlin
Club der Visionäre in Berlin - you have to go here. it's like a daytime club on the canal. next to badeschiff.
Prenzlauerberg -- Utterly fell in love with this part of Berlin. THIS is home.
Shhh! 10 secret tourism attractions in Berlin. #travel
Berlin - Badeschiff (Bathing ship) -wacky things to do in Berlin