Continuing their voyage south through the North Aegean islands of Greece, Paul and Sheryl arrive at the small island of Fourni. In a remote anchorage at the south end of the island, they wait for the “meltemi”, a strong north wind, to quiet down before sailing to Quarry Bay, where they explore an ancient Greek marble quarry and dive on the marble ruins beneath the sea. From here they sail on to the island of Samos where they meet up with geologists who are studying the marble used in the ancient temples here to determine it’s source. They visit the Temple of Hera and the Efpalinio Tunnel, a 1040-metre aqueduct built in the sixth-century BC, an astonishing engineering feat. Samos has a long history of boat building and the group drop in on a local builder still creating traditional “caiques”. His workshop in located in a forest on a mountaintop where he’s close to the best wood for building.