1: Guy Simonnot at the Torca del Hoyón entrance. (photo: Peter Smith, November 2015)
2: Site 4245: a possibly blocked entrance at the base of the Torca del Hoyón depression. (photo: Phil Papard, October 2015)
3: Site 4245: a possibly blocked entrance at the base of the Torca del Hoyón depression. (photo: Terry Whitaker, January 2016)