Canton: Vaud
Swiss topographic coordinates: 521'179, 166'727
Google Earth files:
OpenStreetMap: https://www.openstreetmap.org/node/240027031
Near Mont-la-Ville village, there is a rockstone which upper side is covered by cupules. The signification of these cupules is mysterious and there are several hypothesis.
Geobiliogist Stéphane Cardinaux thinks that it is map of the celtic Salt road, whose cup holes ares steps, the main cup hole would be Mont-la-Ville, and the channels between the cup holes to indicate the road.
Swiss topographic coordinates: 521'902, 168'222
OpenStreetMap: https://www.openstreetmap.org/node/2794057596