Zerostrasse is an intriguing underground tunnel system beneath the city of Pula in Istria, originally built during World War I as a network of shelters and storage areas. These tunnels, which span beneath the city, were designed to protect residents from air raids and offer refuge during times of conflict. Today, Zerostrasse has been transformed into a historical attraction, allowing visitors to explore its dimly lit corridors and learn about Pula's wartime history. The cool, subterranean passages provide a unique and atmospheric experience, connecting the city’s past with its present.