History buffs will want to visit this ancient Greek theater, overlooking the Ionian Sea. Built in the third century B.C., the theater could hold thousands of people attending ancient Greek performances and later gladiatorial games. The structure is built out of rock and is designed so attendees could hear well from any part of the theater. Today, it hosts modern concerts and events.

Past visitors said this is a must-see attraction and that the views of the coast and Mount Etna are incredible. They recommended visiting in the morning to avoid crowds.

The theater is located on Sicily's northeastern coast. Tickets cost 10 euros (or about $11) to visit the site, which is open varying hours depending on the time of year, but typically from 9 a.m. to 4 or 6:30 p.m. daily. For more information, visit the official website.