If you’re a keen traveller, you’ll no doubt have global icons like the Taj Mahal, the Great Barrier Reef and the Great Wall of China on your ‘must visit’ list. This World Heritage Day, though, UNESCO has released a roster of less-trodden destinations to add to your agenda – and, luckily, they’re closer to home. UNESCO – otherwise known as the United Nations Educational, Scientific and Cultural Organisation – offers protection to sites with cultural and natural heritage, recognising places of outstanding universal value. As you plan your next European adventure, why not skip Athens’ overcrowded…