Pula’s Austro-Hungarian era, during which it was the Empire’s main naval port, left the city with a striking set of coastal military defences.
There are 26 forts in all, together with batteries, trenches and tunnels many of which are slowly being reclaimed by nature.
All the of the fortresses have a circular form, designed to help deflect artillery. You can get hold of a map of these installations and track them down on a walking trip.