The Bujaruelo valley is Torla's wilder-feeling alternative to the main Ordesa route. It has river walks, mountain tracks, and a less managed atmosphere, especially once you get beyond the first busy stretches.
It is best with a car or a long walking day, and conditions matter. Treat it as mountain country rather than a scenic lay-by: weather can turn, paths can be rough, and the reward is precisely that it feels less packaged.