Pula is the largest city of the Istria Peninsula on the Adriatic Sea. The Mediterranean climate, beaches and the gulf full of picturesque islands are some of the tourist attractions of this Croatian city. There are numerous historic monuments dating back to the times of the Romans, such as: amphitheatre, forum, Arch of the Sergii, the Temple of Augustus and the Gate of Hercules, fragments of defensive walls and the medieval buildings – the castle, town hall and cathedral. The tourists can see the Venetian fortress called Kaštel, which was built in the 17th century on the remnants of the Roman stronghold. There are also Austro-Hungarian defensive fortifications from the 19th century situated in Pula. Fort Verudella was built of stones and clay, there is a two-storey bunker situated in a round ditch, as well as barracks, warehouses for food, coal and arms.