Switzerland in the Roman era after which the area began to be occupied by Germanic peoples. The Swiss plateau, within the natural borders of the Alps to the South and East, Lake Geneva and the Rhône to the west and the Rhine to the north, was recognized as a contiguous territory by Julius Caesar. This area had been dominated by the La Tène culture since the 5th century BC, settled by a mostly Celtic population (Gauls), of which the Helvetii were the most numerous, but which also included the Rauraci in north-west Switzerland centered on Basel, and the Allobroges around Geneva. South of the Swiss
Burnett River flows south before swinging to the north-east at its confluence with Johnson Creek, passing through the Auburn River National Park, a little-known and untouched piece of pristine bush including Auburn Waterfall, and flows into the Burnett River west of Mundubbera; the Boyne River that rises in the Bunya Mountains National Park south-west of Kingaroy and flows in a general northerly direction, dammed near Proston to form Lake Boondooma, emptying into the Burnett River near Mundubbera, only from the Burnett River-Auburn River confluence; and the Barambah Creek that rises in the hills between Kingaroy and the Sunshine Coast, north of Jimna