Aargau is one of the more northerly cantons of Switserland. It comprises the lower course of the river Aare.
Its total area is 1,404 km², its population is 573,654 (as of 2005). The capital is Aarau. It borders Germany to the north. To the west lie the cantons of Basel-Landschaft, Solothurn and Bern. The canton of Lucerne lies south of the canton of Aargau, Zürich and Zug to the east.
The canton of Aargau is one of the least mountainous Swiss cantons, forming part of a great table-land, to the north of the Alps and the east of the Jura, above which rise low hills. The surface of the country is beautifully diversified, undulating tracts and well-wooded hills
alternating with fertile valleys watered mainly by the Aar and its
tributaries. The valleys alternate with pleasant hills, most of which
are full of woods.
It contains the famous hot sulphur springs of Baden and Schinznach, while at Rheinfelden there are very extensive saline springs. Just below Brugg the Reuss and the Limmat join the Aar, while around Brugg are the ruined castle of Habsburg, the old convent of Koenigsfelden (with fine painted medieval glass) and the remains of the Roman settlement of Vindonissa