Cascadas del Sibiscal
Cascadas del Sibiscal is one of those many waterfalls in the Spanish Pyrenees that grow in strength in the early season and run dry in/after the summertime. Cascadas del Sibiscal is in total over 130 meter high and is often used for canyoning.
Cascadas del Sibiscal is located south of Aisa (Valle de Aisa), in the flow Barranco Picarizola, in the region Aragon-Huesca, Spain.
I am not sure if the canyon is also accessible for hiker or just for canyoning.