Sicily is the largest island in the Mediterranean Sea and one of the 20 regions of Italy. It is one of the five Italian autonomous regions and is officially referred to as Regione Siciliana. Sicily is in the central Mediterranean Sea, south of the Italian Peninsula, from which it is separated by the narrow Strait of Messina. Its most prominent landmark is Mount Etna, the tallest active volcano in Europe, and one of the most active in the world, currently 3,329 m (10,922 ft) high. The island has a typical Mediterranean climate.

Hawaii is a U.S. state located in the Pacific Ocean. It is the only state outside North America, the only island state, and the only state in the tropics. Hawaii is also one of a handful of U.S. states to have once been an independent nation. Hawaii encompasses nearly the entire Hawaiian archipelago, comprised of 137 volcanic islands spanning 1,500 miles (2,400 km).