In older cartographic and lexical works, the term Bavarian Forest refers only to the mountainous region of the Danube Hills, also known as the Anterior Bavarian Forest (Vorderer Bayerischer Wald) or Vorderer Forest (Vorderer Wald), between the Danube and the Regen, which has its highest elevation in the Einödriegel. The High Forest or Hinterer Forest (Hinterer Bayerischer Wald) between the Regen and the Bohemian border, including the mountains of the Arber, Rachel and Lusen, used to be part of the Bohemian Forest. The linguistic usage of the German-Bavarian authorities, the impact of tourism, and the presence formerly of the Iron Curtain contributed to the fact that the term Bavarian Forest was increasingly extended to mean the entire low mountain region on the German side of the border between Bavaria and Bohemia. As a result of political developments after 1989, most recently the accession of the Czech Republic to the Schengen area, however, there is a discernible trend to see the low mountain range on the German-Czech border as a unit, especially in terms of tourism.