The little known route from Biel via Gaicht to the Twannbach Gorge, and further to Twann, is an excursion into Geology. There are numerous large and small boulders along the scenic hiking trails.
The Aare is the longest river lying entirely within Switzerland. Between Biel and Solothurn, it offers perfect conditions for canoeists.
The Jura waters correction is a unique heritage of human creativity. The Nidau Castle Museum, opened in October 2004, aims to heighten this awareness.