James Mates travels to the Greek island of Santorini, the latest tourist destination to suffer from over-tourism, to find out how the social-media friendly holiday location manages its popularity without losing its identity. Barnaby Papadopulos is in Cyprus 50 years after the war that partitioned the island to hear about the thousands of Greek and Turkish Cypriots that disappeared and are still listed as missing and Faye Barker is in Cambados, Spain to learn about sustainable cockle harvesting.