You will get to know the hidden part of the city of Marsala; the one created by the quarrymen during the extraction phase. It will be a city with a particular architecture, made up of limestone pinnacles that rise from the depths of the extraction and a succession of majestic walls and overhangs that make the landscape very similar to the Grand Canyon. It will be a slow and relaxing walk that will take us from the countryside level to 30 meters of depth. The first stretch will allow us to get to know the various spontaneous aromatic plants that flood the route with colors and smells; we will observe the characteristics of the limestone rock that makes up and delimits the open-air quarries and we will talk about this current extraction system. After a stop for refreshments, we will proceed into the quarries in tunnels which, due to their size, can be defined as extensive cathedrals of calcarenite with their 25 meter pillars and massive walls that alternate with the voids dug by the quarrymen.