I am planning to drive from Barcelona to Torla via Ainsa. I would like to see the Anisclo Canyon from the south end of it (not for walking, just admire the view) while I'm in the area. I think I may get a good view of the Anisclo Canyon from Vio/Buerba area. I read somewhere that the road HU-631 becomes one-way road. Does anyone know which way can you drive to, west or east?