It’s no accident that the majority of holiday destinations are on the water. In fact, it’s science. Marine biologist Wallace J. Nichols defines the experience of ‘blue mind’ that is fostered in the human brain by proximity to lakes, rivers and the sea. ‘A mildly meditative state characterised by calm, peacefulness, unity and a sense of general happiness and satisfaction with life in the moment.’ In other words, water makes you happy. Clearly, we should all immediately decamp to the seaside.