Kastro Fortress is a historic site located on the island of Naxos in Greece. Built in the 13th century by the Venetians, it served as a defensive structure to protect the island from invasions. The fortress features impressive stone walls and a series of narrow streets, showcasing the architectural style of the time. Today, Kastro Fortress is a popular tourist attraction, offering visitors stunning views of the surrounding area. Inside the fortress, you can find remnants of ancient buildings, including churches and houses, which reflect the rich history and culture of Naxos.