Historical places of interest in Catania:
Sant’Agata Cathedral and its square with an elephant, the symbol of Catania; Piazza Università with the historical university building dating back to 1434;
Monastero dei Benedectin monks; Greek theater and roman amphitheater; Via Crociferi with its Barocco architectures; Bellini’s opera theater.
Also not too far from Catania: Aci Trezza, Aci Castel and its Norman Castel; Taormina and its Greek theater;
Etna Volcano where it is possible (by volcanic activity it depends if it is dangerous or not) to organize excursion near the main crater at quote 3000 m.