February might be a chilly to go into the water but the Gole dell’Alcantara is worth a visit. The wine train doesn’t seem to run in February so I’d recommend booking a wine visit/ tour. Valenti and Graci are both excellent Etna wines.
There are a couple of very good museums in Catania quite close to the central Railway Station. One is about cinema and the other is a history museum detailing the Allied Landings of 1943. They are next door to each other. Also the fish market is worth a visit.