Really nice experience, my first family trip around Pirineos with my wife and my baby daughter.
great hiking, beautiful waterfalls
I visited the cnayon a lot of times in order to climb peaks as Mt Perdido, Punta de las Olas, Baudrimonts, Soum de Ramond, Cilindro, Casco, Torre, Picos de la Cascada, Marboré, Tozal de Mallo,... and I always enjoyed of this wonderful place.
Ran though Faja de Pelay up to Goriz, Monte Perdido and walked down to Coca de Caballo and Circo de Soaso in a day. Lovely place.
The trailhead for hundreds of wonderful routes. Walk up to the Cola de Caballo (horse's tail) waterfall (2 hours) or futher, up to the Goriz Hut.
There are various "faja" routes - high narrow paths that skirt the steep slopes of the valley - Faja de los Flores & Faja Pelay for example (I've yet to do Flores). Some of these routes are technically complicated, with aided sections - "clavejas" - wires, cable or metal steps. NOT exacly via ferratas but full ferrata gear is essential on some secitions. The Clavejas de Saoso are the easiest and shortest and least expsed (on the route up to Goriz).
This is a super area - but try to come off-season (jeje - its a place that is super and pretty busy at any time of year!) but whatever, it is a wonderful memorable place.
Visited Ordesa (and the Pyrenees) for the first time this summer. Awesome is about the only way to describe it. I don't think the photo's do it justice. I will be going back.