However, the highest point of historic Upper Lusatia is the Tafelstein (Tabulový Kámen) in the Polish part, located at 1123 meters on the eastern slopes of the Smrk (Tafelfichte) in the Jizera Mountains (Isergebirge), the border tripoint of Upper Lusatia with the historical region of Lower Silesia to the east and Bohemia to the south.