Effingen

Bözen (Swiss German: ˈbøːtsə) is a village in the Swiss canton of Aargau. It lies to the west of the Bözberg in the upper Frick valley. Until December 31, 2021, Bözen was an independent municipality in the district of Brugg, since then it has been one of four villages in the newly created municipality of Böztal in the district of Laufenburg.

Elfingen is a former municipality in the district of Brugg in canton of Aargau in Switzerland. On 1 January 2022 the former municipalities of Bözen, Effingen, Elfingen and Hornussen merged into the new municipality of Böztal.

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

Sulz was a municipality in the district of Laufenburg in the canton of Aargau in Switzerland. The late Roman watchtower in Rheinsulz is listed as a heritage site of national significance. On 1 January 2010 the municipality of Sulz merged into Laufenburg.

Hornussen is a former municipality in the district of Laufenburg in the canton of Aargau in Switzerland. On 1 January 2022 the former municipalities of Bözen, Effingen, Elfingen and Hornussen merged into the new municipality of Böztal.

Böztal is a municipality in the district of Laufenburg in the canton of Aargau in Switzerland. It was established on 1 January 2022 with the merger of the municipalities of Bözen, Effingen, Elfingen and Hornussen.

The Bözberg Road Tunnel is a motorway tunnel in Switzerland. The tunnel lies under the Bözberg Pass between Frick and Baden, in the canton of Aargau, and forms part of the A3 motorway from Basel to Sargans. It is 3,705 metres (12,156 ft) long, and was opened in 1996.The tunnel runs roughly parallel to the Bözberg Rail Tunnel.

Ittenthal was a municipality in the district of Laufenburg in the canton of Aargau in Switzerland. On 1 January 2010, Ittenthal merged into the municipality of Kaisten.The historical population is given in the following table:

Gallenkirch is a former municipality in the district of Brugg in canton of Aargau in Switzerland. On 1 January 2013 the former municipalities of Gallenkirch, Linn, Oberbözberg and Unterbözberg merged to form the new municipality of Bözberg.

Mönthal is a municipality in the district of Brugg in canton of Aargau in Switzerland.

The Bözberg Rail Tunnel is a railway tunnel in the Swiss canton of Aargau. It takes the Bözberg railway line of the Swiss Federal Railways under the Bözberg Pass between Effingen and Schinznach-Dorf. The original tunnel was opened during 1875; it is set to be closed to rail traffic during 2020-2021 following the commissioning of its replacement, after which it shall be converted and retained for service and rescue purposes in respect to its successor. During March 2016, construction commenced on the new Bözberg Tunnel, which runs roughly parallel to its predecessor. It is a considerably wider and longer tunnel, being able to accommodate trains up to a height of 4 metres (13 ft). The reason for its construction is to better accommodate larger and heavier freight trains. The second Bözberg Rail Tunnel is scheduled to be opened during 2020.

Aargau Jura Park (Jurapark Aargau) is located north of Aarau, between the rivers Aare and Rhine, in the Swiss canton of Aargau. It straddles the border between Jura and Basel. It spans 241 square kilometres (93 sq mi) and reaches up to 350 metres (1,150 ft) above the valley floor. The park is mainly located on the Jurassic Plateau, between Frick and Villigen, and also encompasses the Aargau Jura mountains and valleys. The northern area includes sparse pine forests, fruit orchards, rocky steppes, dry meadows and terraced vineyards, while the southern region fosters forests and wildlife. It was declared a regional nature park of national importance in 2012 by the Federal Office for the Environment. The villages Herznach and Wölfinswil traditionally mined ore in the park and thus, left many studs. A mining tunnel was excavated and made accessible to visitors.