Tegel the end of 1948. Tegel is chiefly known for being the location of Berlin-Tegel "Otto Lilienthal", Berlin's main airport. It also houses the Tegel Penitentiary, Germany's largest prison with about 1,700 inmates as of 2007, known from Alfred Döblin's 1929 novel Berlin Alexanderplatz. One of Berlin's largest shopping malls "Borsighallen" is located in the former locomotive manufacturing halls of the "Borsigwerke". There is also the "Villa Borsig" at the shore of Lake Tegel, the former residence of the Borsig family. Today it is a school for future diplomats. Beside this Tegel is an extensive residential district with some industry. With
Napa County Airport It was expanded later in the war and renamed Napa Army Airfield, becoming an auxiliary airfield of the Fourth Air Force Hamilton Army Airfield. 4th Air Force used the base to train replacement fighter pilots, primarily flying P-38 Lightnings before being deployed overseas. After World War II the property was deeded to Napa County by the War Assets Administration for civil use. The airport soon became a business hub for what was once a rural, sparsely populated area in the south end of the county. Jonesy's Restaurant opened for business in 1946 at the airport and was a longtime favorite.