Pierced on conglomerate formation, Barranco Alborceral has a lot of nice deep oscuros and estrechos. On the terminal section, the ultimate  rappel about 22 meters height drop you at the entrance of Estrechos de Balced, Sierra de Guara, Aragon province of Spain. Alborceral is local name for strawbery tree. Canyon covered by Alex Oulevey and the author in summer 1998.