The Marina Rünthe is a marina on the Datteln-Hamm Canal in Bergkamen. The port was built in 1939 as a loading port for the Werne colliery. After the mine was closed, Klöckner Bergbau Königsborn-Werne AG continued to use the port as a works port, handling hard coal, building materials, grain and mineral oils. In 1995, the conversion for the leisure area took place and the area was prepared as a marina.