The Fortress of San Carlos de la Cabaña is a historic military fortress located in Havana, Cuba. Built between 1763 and 1774 by the Spanish, it was designed to protect the city from naval attacks. The fortress features thick stone walls and a strategic position overlooking the harbor, making it a key defensive structure during colonial times. Today, the fortress is a popular tourist attraction, offering visitors a glimpse into Cuba's military history. It houses several museums and hosts cultural events, including the nightly cannon firing ceremony, which commemorates its historical significance and provides a unique experience for guests.