Stevns Klint is without doubt one of the most striking natural landscapes in Denmark. But it is not the external beauty of the cliffs, but the secrets it holds within it, which in 2014 caused UNESCO to place 15 kilometres of them among just three natural UNESCO heritage sites in Denmark. Dorthe Pedersen, geologist and world heritage guide at Stevns Klint, explains: “The soft chalk, which makes up the bottom part of the cliff, was created through more than ten million years as the shells of microscopic deceased algae dropped onto the ocean floor.