Sitting below the Sant’Onofrio hermitage, this sanctuary was originally thought to be the house of Sulmona-born poet Ovid when it was first uncovered in the 1950s, but statues later found confirmed it as a Roman-era shrine to Hercules. The sanctuary's former foundations cover a couple of mountainside terraces and include a preserved mosaic floor sheltered in a wooden hut. Precious votive offerings found here are kept at Chieti's Museo Archeologico Nazionale – Villa Frigerj.