Thal District

Balsthal is a municipality in the district of Thal in the canton of Solothurn in Switzerland.

Neu-Falkenstein Castle is a castle in the municipality of Balsthal of the Canton of Solothurn in Switzerland. It is a Swiss heritage site of national significance.

Mümliswil-Ramiswil is a municipality in the district of Thal in the canton of Solothurn in Switzerland.

Neu Bechburg Castle is a castle in the municipality of Oensingen of the Canton of Solothurn in Switzerland. It is a Swiss heritage site of national significance.

Gäu District is one of the ten districts of the canton of Solothurn in Switzerland, situated in the centre of the canton. It has a population of 22,005 (as of 31 December 2020). Together with Thal District, it forms the Amtei (electoral district) of Thal-Gäu.

Oensingen railway station (German: Bahnhof Oensingen) is a railway station in the municipality of Oensingen, in the Swiss canton of Solothurn. The station is a keilbahnhof. It is located at the junction of the standard gauge Jura Foot line of Swiss Federal Railways and Oensingen–Balsthal line of Oensingen-Balsthal-Bahn. It is also a terminus of the 1,000 mm (3 ft 3+3⁄8 in) gauge Langenthal–Oensingen line of Aare Seeland mobil.

Oensingen is a municipality in the district of Gäu in the canton of Solothurn in Switzerland.

Laupersdorf is a municipality in the district of Thal in the canton of Solothurn in Switzerland.

Niederbipp railway station (German: Bahnhof Niederbipp) is a railway station in the municipality of Niederbipp, in the Swiss canton of Bern. It is an intermediate stop on the standard gauge Jura Foot line of Swiss Federal Railways. It is also located at the junction of the 1,000 mm (3 ft 3+3⁄8 in) gauge Langenthal–Oensingen and Solothurn–Niederbipp lines of Aare Seeland mobil.

Niederbipp is a municipality in the Oberaargau administrative district in the canton of Bern in Switzerland. On 1 January 2020 the former municipality of Wolfisberg merged into Niederbipp.

Passwang Pass (elevation 1,204 m (3,950 ft)) is a high mountain pass in the Jura Mountains in the canton of Solothurn in Switzerland. It connects the southern part of the canton of Solothurn via Mümliswil-Ramiswil (south of the pass) and Beinwil, Solothurn (northern side) with the so-called Schwarzbubenland (officially Amtei Dorneck-Thierstein, consisting of the canton of Solothurn districts Thierstein and Dorneck) north of the Passwang mountain chain, and ultimately with the Laufen District in the canton of Basel-Landschaft.

Oberbipp is a municipality in the Oberaargau administrative district in the canton of Bern in Switzerland.