It is regarded as one of the best preserved findings of the Roman times. It is situated in Loutra Edipsou, behind the hydrotherapy center of the Hellenic National Tourism Organization and near the church of Sts. Anargyroi. Syllas cave is a small construction with dome. The whole structure has been covered by the deposits of sulfurous waters gushing across the area and resembles a cave entrance. There are two massive statue pedestals illustrating inscriptions which pay tribute to the Roman emperors, Hadrian and Septimius Severus. The former also bears a later inscription dedicated to the Roman Emperor Contantine. The cave is associated with the Roman general Syllas who used to visit the hot springs to cure the arthritis in his legs.