Halkidiki | Greece

A coastline that stretches to 550km hides a secret. Well, dozens of secrets to be precise, given the number of Blue Flagged beaches that line its shores (you can add to this 3 marinas), making it the leading destination for Blue Flag environmental cleanliness in Greece. All three peninsulas – Kassandra, Sithonia and Mt Athos – protect their gems well. Organised beaches for all, coves that resemble a tapestry of pine-green and turquoise-blue, and near-forgotten islets that can be reached by canoe or a few good strokes on a Stand-up-Paddleboard.