As noted, there are over 700 sites all over the Mediterranean area which are included in this list. Unfortunately the ancient people who made them were in much better shape than most of us today, so they are not very easy to reach! Also many of the sites are frankly a bit boring unless you have a special interest in rock art, like me, because the images are very difficult to see or there are not many of them to begin with.

Some sites in Murcia have recently been developed for better tourist access. Some examples are La Serreta and Los Grajos near Cieza (contact the museum in Cieza for a guide), and Cantos de la Visera near Yecla (contact the museum in Yecla). Others I have been to that have some tourist access and interpretive signs include Pla de Petracos and La Sarga, near Alcoi in Alicante (check with the museum for directions, they may also be able to send someone with you).

Probably the best place I know of to see some examples of this rock art is at the sites in the Valltorta area of Castellón. There is a fairly large rock art museum near Tirig, which has reproductions of some of the more interesting sites, and they arrange tours with a guide who will take you to the sites and show you the rock art. The sites are again not accessible if you have major mobility issues but the hike to most of them is fairly moderate, and the sites themselves have platforms built around them so you don't have to cling to the side of the cliff to see the art!

Most of the sites are not easy to access, especially if you have mobility problems. Cantos de la Visera might be manageable for some, because the shelters are not in the mountains. However you have to walk up the road to the site from the parking area, which is a moderate walk but I don't think it would be wheelchair accessible.