We really had a trip that I will remember forever...
On the top of Montségur
I found the post where I had posted the photo:
Further down the Vicdessos valley, not far from the caves of Niaux, lies the castle Miglos overlooking the valley and the town of Vicdessos.
The fortress is situated on a 20 meters high hill. The name is first mentioned in the mid 1200s when the castle was the seat of the barony of Miglos. The last owners died during the French Revolution, and after that the place has decayed.