Kastelli of Emporeio: The Kastelli of Emporeio is a medieval castle located in the heart of the village of Emporeio on the island of Santorini. It was built in the 15th century and served as a fortress to protect the village from pirate attacks. Today, the Kastelli is a popular tourist attraction and a great place to explore the island’s rich history. Visitors can wander through the castle’s narrow alleys and admire the stunning views of the surrounding landscape.