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
Okmulgee Regional Airport to bring new clients and businesses to the airport while relieving pressure on the 750-acre TAIT-operated Jones Riverside Airport, 20 minutes north, which has already expanded to capacity. The contract has since been extended. In 2016, TAIT drafted an Airport Capital Improvement Plan, also known as a Five-Year Plan, for Okmulgee Regional Airport, which was approved by the Okmulgee City Council on November 15, 2016. The document shows improvements and funding sources for fiscal years 2018 through 2022. Okmulgee Regional Airport Okmulgee Regional Airport is in Okmulgee County, Oklahoma, three miles north of the city of Okmulgee, which owns it.