Cañon de Añisclo
Añisclo Canyon is an impressive breach in the mountain stretching over some 20km, forming a gash in the south slope of Mt Perdido. It is appealing cool, with pine trees clinging to the limestone faces. Narrower than Ordesa Valley, it is harder to reach and has more limited facilities for visitors. On the plus side, it is a more untamed environment with fewer people treading its paths.