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Staffelegg Pass (el. 621 m.) is a mountain pass in the canton of Aargau in Switzerland. It connects Küttigen and Asp. The postal bus route from Frick to Aarau goes over the pass, and there is a restaurant at the summit.

Herznach-Ueken is a municipality in the district of Laufenburg in the canton of Aargau in Switzerland. It was established on 1 January 2023 with the merger of the municipalities of Herznach and Ueken.

Benkerjoch Pass (el. 674 m) is a mountain pass in the canton of Aargau in Switzerland. It connects Küttigen and Oberhof. Until 1801, the pass was the boundary between Austria and Switzerland. The current pass road was built in 1977. A postal bus route runs over the pass to Aarau.

Ueken is a former municipality in the district of Laufenburg in the canton of Aargau in Switzerland. On 1 January 2023 the former municipalities of Herznach and Ueken merged to form the new municipality of Herznach-Ueken.

Herznach is a former municipality in the district of Laufenburg in the canton of Aargau in Switzerland. On 1 January 2023 the former municipalities of Herznach and Ueken merged to form the new municipality of Herznach-Ueken.

Küttigen is a municipality in the district of Aarau of the canton of Aargau in Switzerland.

The Wasserflue is a mountain of the Jura, located north of Erlinsbach in the canton of Aargau. It lies on the range east of the Salhöhe Pass. An antenna is located on the summit

The river Suhre is a 34 kilometer long tributary of the river Aare in the Swiss cantons of Lucerne and Aargau. The river rises in Sempachersee (or Lake Sempach) at an elevation of 504 meters above sea level, and joins the Aare east of the town Aarau at an elevation of 362 meters. The most important side valley is the Ruedertal, which joins the Suhretal (or Suhre Valley) at Schöftland. In the medieval age, the river had several names: Suron (1036), Suranum flumen (1210), Sure (1241). Today, the name is written without "h" in the canton of Lucerne, and with "h" in the canton of Aargau. The most important tributaries are the Ruederchen joining at Schöftland, the Ürke joining at Unterentfelden and the Wyna joining at Suhr.

Zeihen is a municipality in the district of Laufenburg in the canton of Aargau in Switzerland.

Biberstein is a municipality in the district of Aarau of the canton of Aargau in Switzerland.

Biberstein Castle (German: Schloss Biberstein) is a castle in the municipality of Biberstein in the Swiss canton of Aargau.

Oberhof is a municipality in the district of Laufenburg in the canton of Aargau in Switzerland.