Submarine Tunnel

On the southern side of Brač lies a mysterious and powerful reminder of Croatia’s military past—a former Yugoslav navy submarine tunnel. Once a highly classified military facility, this massive structure was carved deep into the rock, hidden from view and protected from air strikes. It served as a secret base for submarines and patrol boats, allowing them to dock undetected and safely refuel or hide during tense geopolitical times. Today, it stands quiet and haunting, with its concrete walls echoing stories of the Cold War era. As you sail inside, you’ll feel the sudden drop in temperature, the shadowy silence, and the sense that you’ve entered another world—one built for stealth and survival. It’s a fascinating stop for history buffs, explorers, and photographers looking for something beyond the usual postcard scenery. A visit to the submarine tunnel is not just a visual experience, but a dive into a hidden chapter of Adriatic history.