The Taubenloch Gorge sits in the Jura hills just north of Biel/Bienne and is one of the more dramatic natural features within easy reach of the city — a narrow limestone canyon cut by the Birs river, with walls that in places rise 30 metres above a path that threads along the base. The gorge walk runs about 2 km one way between the Bözingen end (accessible by bus from Biel) and Frinvillier, with the path occasionally requiring you to squeeze through narrow passages.
The gorge is at its most impressive in spring when the river is high. In summer the walls drip with moisture and ferns, and the temperature inside the canyon is noticeably cooler than the surrounding hills. The walk is easy to moderate in difficulty, though wet rock can make some sections slippery. A circular walk can be combined with the Biel–Magglingen funicular for a half-day outing: ride the funicular up to the Jura plateau, walk across to the gorge entrance, and descend through the canyon back to Biel.