The author chimney down the spiral staircase into Barranco Cueva Cabrito. This amazing conglomerate slot canyon is one of the best of the right bank of the Rio Usuala. The final rappel from a dark grotto lead you to the bed of the Rio Usuala just before entering the narrow canyon called "Estrecho de Balces". Sierra de Guara Regional Park, Spanish Pyrenees. See also the down climbing scenes into Barranco Cueva Cabrito.