ISTRIADUCTION All Year | Working time: On Call | Free per Entrance   Huge fortification on the coast has left us a unique impression. Large massive stone walls placed on rocks and covered with greenery and trees are simply a unique sight. The fortification was built in the 19th century during the Austro-Hungarian Empire as part of the defense shield of the main naval harbor. If you ask for the fortress to open you will have a chance to see tunnels and beautiful views from the top of the fort. Tips: Various entertaining events are often held inside the fortress, which adds extra value to the beautiful fortress. Try to search event program to have some fun inside the biggest fortification in Štinjan. MORE ISTRIAGO COLLECTIONS