I would start in Jaraba. From there, not only can you walk a large part of this spine, but in addition to a sanctuary nestled in the rock, you have, within walking distance, one of the greatest wonders of Aragon and, by default, of Spain: the Piedra Monastery. An unusual Natural Park that will dazzle you. Small towns don't usually have museums, but in some cases, you can find open-air archaeological sites, which are certainly interesting. Very close to Molina de Aragón, you have the remains of a Celtiberian settlement, the Ceremeño hill fort. Deep in the Barranco de la Hoz, you have a most interesting Marian sanctuary, and if you're also interested in anthropology, you can glimpse curious cave structures, which, incidentally, were once homes. Just as important as the cryptic message of the petroglyphs are the surroundings that caught the attention of the hands that made them. The important thing is to feel the power of those environments and then ask ourselves why they attracted our ancestors so much.