Where is Ritterstein Nr. 280, ""Heidenmauer - Hallstatt-Latene-Zeit?

Where is Ritterstein Nr. 280, ""Heidenmauer - Hallstatt-Latene-Zeit located?

Ritterstein Nr. 280, ""Heidenmauer - Hallstatt-Latene-Zeit, Rheinland-Pfalz, Germany (approx. 49.46536°, 8.151182°)

Where is Ritterstein Nr. 280, ""Heidenmauer - Hallstatt-Latene-Zeit on the map?