Tierpark (Berlin U-Bahn) by 1 July 1989, just a few months before the fall of the Berlin Wall. When the Berlin Wall fell, the line was subsequently renumbered to U5 in 1 July 1990. Tierpark (Berlin U-Bahn) Tierpark is a Berlin U-Bahn station located on the . It is named after the Tierpark Berlin, one of the two zoological gardens in Berlin. Prior to the opening of the station, the line was intended to go to Karlshorst in the early 1950s/60s plans. Construction of the station began on 19 September 1969. This station was opened in 1973. It was the one and only
Berlin Wall that year (). Similar, very limited arrangements were made in 1964, 1965 and 1966. In 1971, with the Four Power Agreement on Berlin, agreements were reached that allowed West Berliners to apply for visas to enter East Berlin and East Germany regularly, comparable to the regulations already in force for West Germans. However, East German authorities could still refuse entry permits. East Berliners and East Germans could not, at first, travel to West Berlin or West Germany at all. This regulation remained in force essentially until the fall of the Wall, but over the years several exceptions to these rules