Kashin is a town and the administrative center of Kashinsky District in Tver Oblast, Russia, located around a rural agricultural area on the Kashinka River. Population: 16,171; 17,299; 21,186; 18,000.
Wikipedia https://en.wikipedia.org/wiki/Kashin_(town)
Coordinates 57°21'42.318" N 37°36'41.234" E