Bern lies on the Swiss plateau in the canton of Bern, slightly west of the centre of Switzerland and north of the Bernese Alps. The countryside around Bern was formed by glaciers during the most recent ice age. The two mountains closest to Bern are Gurten with a height of and Bantiger with a height of . The site of the old observatory in Bern is the point of origin of the CH1903 coordinate system at .