Diocletian's Palace is the heart of Old Town Split. Imagine the glory of 4th century Roman architecture bustling with cafes, restaurants, and museums. More than just a palace, the structures are more of a fortress. It's the perfect places to have had a couple of drinks and got lost in the maze of cobblestone streets. There are tons of cute Bodegas for food and wine. In the main square, you can sit on the steps and enjoy a drink or appetizer surrounded by the beauty of the white marble walls. Also in the square is the Cathedral of Saint Domnius, regarded as the oldest Catholic cathedral in the world that remains in use in its original structure.
Another cool detail, this palace was used as a set in the 4th season of Game of Thrones.