Mount Etna, Europe's largest active volcano, is located just outside the city. The climb to the summit is a little bit challenging, but well worth it!, for the glorious view, and the astounding colours of the mountain. Remember to follow the advice of your guide at all times, and not to stray from the path.
The Teatro Greco, an amphitheatre first constructed by Greek settlers around 300BC and given its present shape by Romans in the first century AD is still used for performances today. It affords an incomparable view over the sea with Mount Etna beyond.
The Museo Archeologico (Archaeological Museum) is relatively small, but has some interesting and impressive exhibits.
Il Duomo (cathedral), built in the 1400s on the ruins of a more ancient church, is of an unusual fortress-like design. The main portal was rebuilt in 1636 and is notable for its sculpted Renaissance-style rosette.