The flea market behind Mauerpark is quite a hit with both locals and tourists. It was a big market with a mix of sellers of used goods and antiques, local artists and craft maskers, and loads of food vendors.
We were short on time so skimmed through the whole market and headed straight to the Sunday "free karaoke" in Mauerpark. It was a round stone platform serving as a stage with ascalating stone stairs around serving as seats for a large crowd of audience ... the setup almost felt like one of those ancient amphitheater’s. We listened to a few songs ... literally anyone in the audience can go on the stage by raising your hand to volunteer. The singing level was quite mixed but the audience was very forgiving. They clap for everyone no matter how well you sing.