Crete is Greece's largest island and probably familiar to you, but it's often overlooked in favour of other Greek islands like Mykonos and Santorini. Known for its beautiful sand beaches and mountains, there's a wide range of activities for visitors. If you're into Greek Mythology, you can visit Odeon Cave, which was the birthplace of Zeus. Also unmissable is a trip to Spinalonga, the tiny island near Elounda that featured in Victoria Hislop's novel The Island.