This coordinate is located on the dream trail "Pellenzer Seepfad" near the forest lake at Kruft.
The coordinates of this waymark are: UTM 380229 / 5585156
this corresponds to N 50° 24.374 E 007° 18.870 (degrees minutes (WGS84))
"The UTM system (Universal Transverse Mercator) is a global coordinate system. It divides the earth's surface (from 80° South to 84° North) in stripes into 6° wide vertical zones, which are individually flattened with the most favourable transverse Mercator projection and covered with a Cartesian coordinate system.
The Universal Polar Stereographic Projection (UPS) is used to image the polar caps.
Both in Germany and in Austria, UTM coordinates are increasingly used with reference to the reference system ETRS89 with the GRS80 ellipsoid. These are also increasingly used in the national surveying of other countries. This means that the Gauss-Krüger coordinate system, which is related to UTM, will lose importance in the long term. Military Geographical Institutes meanwhile exclusively use the Military Grid Reference System, in the German-speaking area also UTM Reference System, short form UTMREF, which is a plan-square-oriented geographical reporting system based on the UTM coordinate system."
Wikipedia
Translated with www.DeepL.com/Translator