In the heart of Siracusa’s charming Oritigia neighborhood lies the ruins of a Greek temple to the god Apollo, dating from the sixth century B.C. Some of the foundation and stairs, as well as much of one wall and a few columns, still stand. The temple is in the middle of a large square and, while you can’t enter it, you can walk around the ruins and view them from all sides, and they’re well-lit at night.