Since the beginning of the war, Madrid was one of the main stages of the contest. The defense of the old bridge and El Villar dams, vital to the water supply to Madrid, He did this front is kept in permanent tension. The frontline on this side of the mountains remained almost unchanged throughout the war.

Included in the Plan of visited sites of the community of Madrid, This historical route boasts the largest concentration of military infrastructure on both sides kept in the region.

On walls of Buitrago (Old bridges) Nestled in a setting of high landscape value you can find 26 items restored and signposted, as nests of machine guns, bunkers, trenches and command posts.

In the beginning of the route (Walls of Buitrago) There is a center of interpretation of the path of the water front, his visit will help us to put into context this journey of high historical and patrimonial value.