It's easy to see why Denmark is often called the world's happiest country. Not only do they have equal parental leave for men and women, free higher education and trains that run on time, but they burn more candles per household than anywhere else.So nobody knows more about happiness - what the Danes call lykke - than Meik Wiking, CEO of the Happiness Research Institute in Copenhagen and author of the bestselling sensation The Little Book of Hygge. But he believes that, whilst we can certainly learn a lot from the Danes about finding fulfilment, the keys to happiness are actually buried all around the globe.