Cava d’Ispica is a short drive from central Modica. It is a narrow valley that extends for about 14 km between Modica and Ispica. It constitutes one of the largest natural-archaeological complexes in Sicily due to its complex and varied stratigraphy that unfolds from 3000 BC to the High Middle Ages. The morphology of the valley, the soft limestone, the easy defensive position, the proximity to the sea, the presence of a river network, which was navigable, have collectively helped to make this place one of the largest cave sites in Sicily, where the necropolis, from the Sicilian ones with oven graves to classic ones, from the underground to the Byzantine Christian catacombs, with rock dwellings, from prehistoric caves to those medieval troglodytes.
See a full description of this remarkable site at http://www.scoprimodica.it/en/must-see/museums/parco-archeologico-cava-ispica/