Enna is a Sicilian city located in the center of the island, with a population of around 25, 000. It is known for its archaeological sites and its Norman castle. Messina is a port city on the northeast coast of Sicily, with a population of around 250, 000. It is known for its beautiful harbor and its many churches. Palermo is the capital of Sicily, located on the northwest coast of the island, with a population of around 700, 000. It is known for its vibrant culture, its colorful markets, and its many historic monuments.