Frohburg Castle

Trimbach is a municipality in the district of Gösgen in the canton of Solothurn in Switzerland.

Trimbach railway station (German: Bahnhof Trimbach) is a railway station in the municipality of Trimbach, in the Swiss canton of Solothurn. It is an intermediate stop on the summit branch of the Hauenstein line and is served by local trains only.

Unterer Hauenstein Pass (el. 691 m.) is a mountain pass in the Jura Mountains between the canton of Basel-Country and Solothurn in Switzerland. It connects Buckten in Basel-Country and Trimbach in Solothurn. The pass road has a maximum grade of 6 percent. The pass was probably already used by the Romans. In 1993, Roman artifacts were discovered at the pass. It also lies close to the Roman settlement of Augusta Raurica.

Wisen is a municipality in the district of Gösgen in the canton of Solothurn in Switzerland.

Hauenstein-Ifenthal is a municipality in the district of Gösgen in the canton of Solothurn in Switzerland.

The Wisenberg (1,002 m) is a wooded mountain of the Jura Mountains, located between Häfelfingen and Wisen in northern Switzerland. The summit lies within the canton of Basel-Landschaft, near the border with the canton of Solothurn. The Wisenberg is both the northernmost and easternmost summit above 1,000 metres in the Jura Mountains. On the summit is an observation tower.

St. Martin is a Roman Catholic church in the town of Olten (Switzerland). It is a three-nave columned basilica without transept with three chorapsideas. The church is considered as the "most significant Neoromanesque Greater Church of Switzerland from the late period of historicism".

Olten (High Alemannic: Oute) is a town in the canton of Solothurn in Switzerland and capital of the district of the same name. Olten's railway station is within 30 minutes of Zürich, Basel, Bern, and Lucerne by train, and is a rail hub of Switzerland.

Olten District is one of the ten districts of the canton of Solothurn in Switzerland, situated around the city of Olten. Together with the Gösgen District, it forms the electoral district of Olten-Gösgen. It has a population of 56,109 (as of 31 December 2020).

Olten Hammer railway station (German: Bahnhof Olten Hammer) is a railway station in the municipality of Olten, in the Swiss canton of Solothurn. It is an intermediate stop on the standard gauge Jura Foot line of Swiss Federal Railways.

Olten railway station (German: Bahnhof Olten) is a major hub railway station in the canton of Solothurn, Switzerland, at the junction of lines to Zürich, Bern, Basel, Lucerne and Biel. As a result, Olten is a railway town and was also the site of the main workshop of the Swiss Central Railway (German: Schweizerische Centralbahn), which became a major workshop for the Swiss Federal Railways (SBB CFF FFS). It is the southern terminus of the Basel Regional S-Bahn S3 and S9 lines, the northern terminus of the Lucerne S-Bahn S8 line, and the western terminus of the Aargau S-Bahn S26 line. Although Olten only has 18,000 inhabitants, the station is used each day by about 80,000 passengers and is one of the 10 busiest in Switzerland, busier than even Geneva. It serves 1,100 trains a day, making it one of the busiest in Switzerland.

Läufelfingen railway station (German: Bahnhof Läufelfingen) is a railway station in the municipality of Läufelfingen, in the Swiss canton of Basel-Landschaft. It is an intermediate stop on the summit branch of the Hauenstein line and is served by local trains only.