Möckernbrücke is a station of the Berlin U-Bahn network in the western Kreuzberg district, named after a nearby bridge crossing the Landwehrkanal. The bahnhof (train station) is part of the first Stammstrecke route of the Berlin U-Bahn opened on February 15, 1902. As the station also served the nearby Anhalter Bahnhof the original building was soon getting too small to cope with the rising number of passengers. It therefore was demolished and replaced by the current station opened on March 25, 1937. Severely damaged by air raids it was closed on January 30, 1944 and not reopened until June 16, 1947. I like it here for the spookiness and feeling of impending doom that it has on a rainy day.
A place where I spend some time almost everyday is the Marheineke Markthalle on Bergmannstraße in Kreuzberg. It's just around the corner from where I live and a great place to buy fresh food and products from local farmers or all kinds of delicatessen from different countries. Many market stalls also sell freshly prepared food and it's always busy at lunchtime. For saturday mornings try the original french croissants.
My favorite lake to visit during the warmest months. It's located in the southwestern part of Berlin and it's reacheable by public transportation, just around 40min from the city center.