A cave whose roof has collapsed, leaving a natural skylight that drops a column of light onto water inside, you swim in through…A cave whose roof has collapsed, leaving a natural skylight that drops a column of light onto water inside, you swim in through a sea-level tunnel and surface in a rock amphitheatre open to the sky. Quieter and wilder than the famous Vis caves. Local tradition holds this is where Calypso held Odysseus for seven years, and Mljet has claimed the Homeric connection for centuries, there is a rival claim from Malta's Gozo. Mljet was gifted to Benedictine monks in the 12th century, which is why its forests survived. Anchorage: Day visit by tender from a Polače or Pomena anchorage, do not leave a yacht on the south coast overnight. Hazards: Any south swell makes the entrance dangerous. Fully exposed coast. Plus