U7 (Berlin U-Bahn) · Relations URL: https://knowledge.ivjn.us/en/concepts/ubahn-berlin-u7/relation.html With 31.8 km and 40 stations, the U7 is the longest line of the Berlin U-Bahn; it was opened on 19 April 1924 and connects Rathaus Spandau via Neukölln and Gropiusstadt with Rudow. Page 1 / 0, 0 total