St. John’s Fortress (Fort St. Ivana)

St. John’s Fortress, also known as Tvrđava sv. Ivana, began construction in the 14th century and was completed in the 1500s. Strategically positioned to guard Dubrovnik’s Old Port from seaborne threats, this fortified tower has stood for centuries. Today, visitors can explore its historic ramparts and enjoy panoramic views of the Adriatic Sea. The fortress now houses the city’s aquarium and maritime museum, offering a blend of natural and cultural insights into Dubrovnik’s rich Ragusan heritage.