Further up the Vicdessos valley from the ice age paintings of Niaux ( https://mountainsrivers.com/2014/02/23/the-ice-age-paintings-of-the-grotte-de-niaux/) is one of the less well known Cathar castles, known as Montréal de Sos. It sits on a rocky outcrop, the Vic de Sos, from which the valley gets its name. Occupied since the Bronze age, this was the site of an Iron Age oppidum, a Carolingian fortress, and during the Cathar period one of the most powerful castles of the Foix region, Montréal-de-Sos. Under the castle remains is a cave with two exits – or an entrance and a different exit. Such caves were used for initiation rituals in Cathar times.
The Vic de Sos, 2011. On top is Montréal de Sos, entrances to the Grail Cave below.
Mountains and rivers 