Jablunkovská brázda is an extensive depression in the Western Beskydy Mountains, separating the Moravskoslezské and Slezské Beskydy ranges. It stretches from Jablunkovský průsmyk to Třinec, with a length of over 15 km and a width of 8 km. The Olše river flows through the valley, creating terraces, and the landscape is characterized by rolling hills. The highest point is Kympa (formerly Kempa), a wooded hill.Wikipedia