From Gíthion, it's just a short walk by causeway to the islet of Kranae, with its landmark lighthouse. This white-marble, octagonal beacon stands 25 meters (82 feet) high and dates back to 1873. The light, which flashes every 18 seconds, can be seen as far as 17 kilometers (10 miles) out to sea. Visitors can learn about Gíthion's long nautical history at the small maritime museum inside. They'll also hear the legends of Kranae: According to mythology, Paris fled here after abducting the beautiful Spartan queen Helen and igniting the Trojan War.