Trieste is a port city in Italy that sits between the coast of the Adriatic Sea and Slovenia. Watch beautiful yachts, sailing, and fishing boats at the Trieste port and harbor. Get a ringside view of the shipping operation in the bustling port that offers interesting sights. The harbor is the best place for viewing the sunset. Marvel at the stunning architecture of Piazza Unita Italia, a colossal square that faces the Adriatic sea. Visit the Roman Amphitheatre in the historic old town. The well-preserved structure has retained its original seating and stage area with various columns and walls. A visit to Trieste is not complete without a visit to the magnificent Miramare Castle, a waterfront palace with excellent interiors and sprawling gardens.