This double natural arch is located on a small karstic area located very close to Col de l'Alpe (Alpe Pass) on Chartreuse Regional Natural Park in Isère department of France. The largest opening has a measured span of 8.0 meters and the second (photo) has a span of 5.5 meters. All year round, there is snow at the bottom of the well where is located the two parallell arches. In spring, the arch is under the snow. IGN topographic map Top 25 #3333 west Nord Chartreuse (pleat D8).