The Greek Open-air U-shaped Theatre in Taurmina is the second largest theatre in Sicily. It was built in the third century B.C. Because it was built on a cliff, it seems to be suspended between the sea and the sky. It is also the most distinctive Greek theatre in the world. It can overlook Mount Etna and the blue Mediterranean Sea. Every summer, the Taolmina International Art Festival is held here. There are also some classical opera performances. The theatre is preparing a concert when visiting. The elder sister of the same trade tried to sing bel canto in a loud voice. The sound effect was extraordinarily good. The ancient Greeks made great contributions to world civilization thousands of years ago.