Bern lies on the Swiss plateau in the Canton of Bern, slightly west of the centre of Switzerland and 20 km north of the Bernese Alps. Bern is built on very uneven ground. The countryside around Bern was formed by glaciers during the most recent Ice Age. Bern has river Aare around town. As a natural fortress on three areas: the north, south and east. The west wall of the city had created. And bridges that can whip up and down.