The Fortress of San Carlos is a historic military structure located in Cuba. Built in the 18th century, it was designed to protect the city of Havana from naval attacks. The fortress features thick stone walls and strategic positioning along the coastline, making it a key defensive site during colonial times. Today, the fortress is a popular tourist attraction, showcasing its rich history and architectural significance. Visitors can explore the grounds and learn about its role in various conflicts, including the Spanish-American War. The site offers stunning views of the surrounding area, enhancing its appeal to history enthusiasts and tourists alike.