The main economic activities of Bad Zwischenahn were and are based on tree nurseries, the food industry (sausage and ham production), and resort community services for the well to do urban population of Oldenburg and
Bremen. Bad Zwischenahn is a
spa town, German :
Kurort. The lake is used for boating, bathing and recreation, with some eel fishing still undertaken. One of the premier sites for tourists is a windmill originally built in 1811 in
Westerstede. It is part of a historical museum farm consisting of 14 houses and auxiliary buildings that were moved to their today's location from 1909 to 2004. One of the buildings is called the
Spieker and shelters a restaurant of the same name, integrating into the centuries-old architecture. A major source of income is the tourism industry. In Bad Zwischenahn there is an above average number of apartments from private providers. These homes often have a higher standard and are awarded with 3 stars or more. Bad Zwischenahn is also a popular tourist destination for retirees, due to the numerous spa facilities.
The Karl Jaspers mental hospital Gedenkstätte_Wehnen_Schild.jpg|Memorial site
Alte Pathologie Economically important as well is the psychiatric hospital in the village of
Wehnen, 8 km east of the town itself. This
Karl-Jaspers-Klinik has a staff of about 1,000 men and women. It is the academic psychiatrical hospital of the
University of Oldenburg. The institution, already founded in 1857 as a lunatic asylum, nowadays having a good reputation, was notorious during
Adolf Hitlers
Third Reich. Many patients were brought to death within the Nazi
euthanasia policy (
Aktion T4), in many cases by food deprivation. Not earlier than about the year 2000, scientific investigations into these
crime against humanity were carried out. A small building on the institution's premises,
Alte Pathologie, (Ancient Pathologic Lab), was transformed into a memorial centre in 2002. In 2017, a movie, starring
Nadja Uhl, titled
Ich werde nicht schweigen ( I will not keep silent), was brought out. This film deals with the fate of a woman, falsely declared lunatic by the Nazis in Wehnen. The film is based on true events. ==Transport==