bird coastline estuary low Mud mudbank natural nature pattern rill texture tidal tide water bands beach cave chalk cliff danger flint Italy sea shore summer white blue cloud islands islets mountain mountains Natural landscape norway ocean rainbow rocks sky water resources architecture Arnside cumbria England english Great Britain Jetty leisure Morecambe Bay pier sandflats view coast fjord frozen HDR ice icy lake Nyberg rock sand season stone tree winter buildings channel hazard houses lighthouse norwegian passage promontory town warning footprint footprints holiday path walk bridge footbridge Sussex wooden Greece.Greek harbour hillside lamp light mediterranean streetlight Broughty city cityscape dundee ferry peaceful river shoreline