We emphasize it foz from Lumbier, who was declared a Nature reserve in 1987, being foz the term used in Navarre sickles, cannons or ravines referring to . The river Salazar ends in the Irati, and the wealth of both works the Lumbier foz. In the exit of the foz, the way connects with a footpath that borders on the rock and there comes to the Bridge from the Devil, bridge of only one arch, of the XVIth century, destroyed by French in the war of the Independence and that takes his name of a legend the one that his builder would have invoked to the devil for to carry out such a difficult work.