Located on the Dalmatian coast of the Adriatic Sea, Zadar is a Roman-era city with a modern and youthful vibe. Stroll along its beautiful tree-lined promenade. Start at The Sea Organ, an art installation consisting of 35 pipes cut into the promenade. Soothing chords become a cacophony when the waves are choppy, creating an unpredictable concert orchestrated by the sea. Classical sights include the Roman forum, of which only a few columns and an altar remain. Stones from here were used to build the neighboring rotunda of 9th-century St. Donat's Church. The church of St. Simeon contains a beautifully crafted silver reliquary, while more can be seen in the Gold and Silver of Zadar exhibition at St. Mary's church. There are also dozens of nearby islands for exploring and national parks where you’ll enjoy lakes, waterfalls, mountains and secluded wilderness.