The Fortress of Agia Mavra is a historic castle located on the island of Lefkada in Greece. Built in the 14th century, it was designed to protect the island from pirate attacks and invasions. The fortress features impressive stone walls and a strategic position near the entrance of the island, making it a significant military structure of its time. Today, the fortress is a popular tourist attraction, showcasing its well-preserved architecture and beautiful surroundings. Visitors can explore the grounds, enjoy panoramic views of the sea, and learn about the history of Lefkada and its defenses against threats throughout the centuries.