Early morning departure toward Vis Island, which, due to its unique geographical position, served as a strategic harbour for the Yugoslav navy and was off-limits to tourists for many years. Because of that isolation, Vis has kept a distinctive charm often described as “the Mediterranean as it once was.” Nearby lies the tiny island of Ravnik, home to the Green Cave (entrance fee to be paid on the spot). The cave gets its name from the striking green light that reflects through an opening in the ceiling, creating a surreal glow in the water. After a short swim stop, continue toward the island. Overnight will be in Vis or Komiža (depending on berth availability). The town of Vis grew near the remains of ancient Issa, the first urban centre in Croatia, founded by the Greeks in the 4th century BC. Visit the Roman Baths and the City Museum, or enjoy a walk along the coast with views of the villae rusticae that still line the shore.