The geography of Slovenia’s greatest mountain range, the Julian Alps is a confused mess. Mapmakers are much more at home with the Karavanke.  This chain extends for about 75 miles – 120 kilometers – in a west to east fashion geographically separating the Drava and Sava river valleys.  They form a border between Slovenia and Austria. The Karawanke continue the function of the Carnic Alps separating Italy and Austria further to the west.  As a border, the Karawanke have served that purpose since at least Roman times.