The park is a must-see if you are around. It even deserves a trip if you are visiting Zaragoza and its surrounding (less than 1.5 h from the city, about 20' from Calatayud or the A2). A pleasant park during the hot harsh aragonese summer nonetheless it gets crowded, lovely at fall or spring, calm and relaxing in winter. If you are a Photography lover don't hesitate to take all your gear, but you'd better come on labour days and avoid the high season. First make a preliminary tour to select your working points, and leverage the first opening hours. If you want to make the most of light conditions, a 10 stop filter will let you get rid of passer-by, let alone capture wonderful silky water textures. There's a convenient campsite nearby, economic hotels in Nuevalos, and the austere well nigh sleek hotel next to the park, which occupies the revamped building of an old Cistercian Monastery. My rating here corresponds to this facility, not to the park as such. The inconspicuous outside of the hotel doesn't match the imposing interior hallways around the main entrance court and stately principal stairs. Guest rooms are clean and moderately comfortable, with good heating in winter and AC in summer, and an enjoyable verandah over the park where you can leisurely read or even have a cold dinner on your own during the warm stations, hearing to the natural relaxing white noise coming from the park waterfalls. The place is pretty quiet. The rooms convey kinda monastic feeling - they occupy the space taken by two or three former monastic cells as a matter of fact- and matches the requirements of the average 3 stars Spanish hotel, but would benefit from some revamping, for my taste. The hotel offers Spa facilities, and an outdoor swimming pool during the summer, but I've never enjoyed either of them. The worst experience I've had in the place has been the restaurant. Being the only choice at evening if you are staying there, it offers "wedding style" dishes, I mean far expensive for what you eat. The breakfast buffet is great for the price. I've always found the staff kind and helpful.