Embark on an exclusive Santorini excursion that takes you above and below the crystalline waters of the island's mostly submerged caldera. Bring your swimsuit; in addition to sailing along the coast, the captain will drop anchor so you can dive into the active volcano's sulphuric waters. After transferring to shore via tender, you'll drive to the area of Vlychada where your catamaran awaits. Once aboard the vessel, your captain will set a course for fun and relaxation. Unwind on deck as you glide past the stunning white-washed villages perched atop Santorini's reddish cliffs. And learn the history and mystery surrounding the Greek myth of Atlantis as you sail past Akrotiri lighthouse, one of the oldest in Greece. Soon, the seven-mile-wide caldera, home to two small volcanic islands, will come into view. At the end of the tour, you'll be taken to Fira for independent sightseeing and return by local tender.