Iberian Peninsula | Level 2 (Parent) |
         Portugal-Galicia | Level 3 (Sibling) |
         Cordillera Cantabrica | Level 3 (Sibling) |
         Pyrenees | Level 3 (Sibling) |
         Castile Ranges | Level 3 |
                 Sierra de Gata | Level 4 (Child) |
                 Sierra de Gredos | Level 4 (Child) |
                 Sierra de Guadarrama | Level 4 (Child) |
                 Sierra de San Pedro | Level 4 (Child) |
                 Sierra de Guadalupe | Level 4 (Child) |
                 Montes de Toledo | Level 4 (Child) |
                 La Mancha | Level 4 (Child) |
         Sistema Iberico | Level 3 (Sibling) |
         Balearic Islands | Level 3 (Sibling) |
         Andalucian Ranges | Level 3 (Sibling) |