This tower was built of wood, principally Douglas fir obtained from local forests. This is just one of many examples of how Lausanne is a city adept at sustainable development. At the foot of the tower, you then continue along the wide tarred forest pathway. At the end of this pathway, turn left and go downhill to your right. At the bottom of the slope, cross the road at the pedestrian crossing next to a bus stop, then a little further along take the path that passes in front of a house with a pale orange façade. The end of this pathway brings you out at the Signal de Sauvabelin look-out post. 10 mins.