The town of Lausanne is sitting on hills, carved over time by small rivers running down between them. While Lausanne expanded during the 19th century, most of these rivers have been channeled in order to gain constructible surfaces.
But thankfully only 10 minutes east of the center one can still find a river in it's original and natural environment. The water runs on the bottom of a steep gorge, with its slopes covered by a dense forest.
The light rain falling this evening did not help climbing in this naturally damp forest, but added deep green colors to the scene. There is no way to stay at home with these conditions :)