- Lyss is a small town located in the Seeland administrative district in the canton of Bern in Switzerland. It has a population of around 16,000 and is situated on the southern bank of the Aare River. Lyss is well-known for its agricultural activities and is surrounded by fertile farmlands. It also has a charming historic old town with several notable buildings, including the St. Martin's Church and the Lyss Castle. The town offers a range of recreational activities, such as hiking and cycling trails, a public swimming pool, and various sports facilities. Lyss has good transportation connections, with a train station and easy access to major roads, making it a convenient base to explore the surrounding region.