A lovely (can be challenging) walk up the hillside to get to the lovely fortress (also available to drive and park) - but I would recommend walking in the morning when the sun isn't at its hottest. The breathtaking views are certainly worth the €10ea entrance fee. We were also pleasantly surprised by the café being within the fortress, selling affordable typical café products (we're used to having to pay extortionate prices for café in public attractions in the UK so we were encouraged to see that not all attractions around the world are the same). They have free toilets available here too. Take the fortress at your own pace, enjoy the light breeze and shady spots throughout, and the various angles of the spectacular views of Hvar's port which can only really be appreciated from this height. The majority of the fortress is stair based so this would not be suitable for those who struggle with stairs. If there was more of an interactive experience and a few extra signs at the top of the fortress to see what you're looking out on would make it 5* in our opinion. Overall a very pleasant adventure, it felt good to explore some history of Hvar.