Selm is a town in the district of Unna, in North Rhine-Westphalia, Germany. It is situated approximately 20 kilometers north of Dortmund and 25 kilometers west of Hamm.
Wikipedia https://en.wikipedia.org/wiki/Selm
Official Website https://www.selm.de/
Coordinates 51°42'1.998" N 7°28'7.01" E