An unnamed river
Based on OpenStreetMap data, this unnamed river is 2 km long.
It is in Russia, flowing through the subregions of Kaluga, Tula
Map
osm.org Distributaries / Outflows
It flows into the sea:
2 km of total upstream flows in at N 54° 38′ 57″, E 37° 11′ 57″ at OSM node n4146713369.
Tributaries
It has 0 tributaries.