A true hidden gem of Pula is its underground tunnel system, open to visitors.
Locals call it Zerostrasse – the “zero streets.” Built during the Austro-Hungarian era when Pula was the empire’s main naval base, these tunnels were part of a defense system. They served as ammunition storage, shelters, and communication corridors.
On hot summer days, Zerostrasse offers a refreshing break – with a constant temperature of 14 to 18°C.