Tiergarten is a locality within the borough of Mitte, in central Berlin (Germany). Notable for the great and homonymous urban park, before German reunification, it was a part of West Berlin. Until Berlin's 2001 administrative reform, Tiergarten was also the name of a borough (Bezirk), consisting of the current locality (Ortsteil) of Tiergarten plus Hansaviertel and Moabit. A new system of road and rail tunnels runs under the park towards Berlin's main station in nearby Moabit.