Villnachern – a municipality in the Swiss canton of Aargau. Included in the Brugg district.
Most of the canton is a mountainous country. Aargau, however, one of the plains of the Swiss cantons. The main river of Aargau – Are – shares the canton into two parts; Northwest busy Jura mountains (the highest point – Mount Vasserflu, 869 m), southeast (Mittelland) – Linden mountains (elevations to 897 m).
The area is irrigated by rivers Aargau Aare and the Rhine basin (in the north-western part); Canton cut up a variety of broad valleys, flowing in the picturesque and fertile valley of the ARSK.