Whether it’s bike polo, urban golf or scaling public buildings, interesting new urban sports are leaving a distinctive mark on German cityscapes. The metropolitan antics add a twist to traditional sports — and may be cropping up on stretch of tarmac near you soon. The Wassertorplatz in Berlin’s Kreuzberg district is full of black bicycle skid marks — and more are being added all the time. The screech of bike tires merges with rattling subway cars passing overhead and punk rock which blasts from an old cassette player.