Avenc de Coll Alt

In El Perelló (Baix Ebre). From the Bassa d'en Ferràs (or Ferrà according to the ICC) one must follow the first track on the right until reaching a firebreak located on the left. Following it we will find a small ridge path that continues along the crest until crossing a very faint stream and where there is a group of trees; a little further on, next to some smooth stones, is the pit. Coordinates with no reliability whatsoever and a location of little precision.