Aerial view, Hallig Norderoog, small island in the Wadden Sea, Norderoog, Schleswig-Holstein, Germany

Aerial view, Hallig Norderoog, small island in the Wadden Sea, Norderoog, Schleswig-Holstein, Germany

© Holger Weitzel/imageBROKER/Alamy - 2016-05-30

island landscape artificial island coastal and oceanic landforms geology spit geological phenomenon map estuary river delta atoll world