afternoon animals bathers bathing beach cool cooling currents dogs drag enjoyment friends fun men ocean people pets relaxation relaxing sand sandy seashore summer sun sunshine swimmers swimming tide tides undertow warm weather water waves women angles colors colours concrete Jetty levels long jetty low tide perspective perspectives posts pylons railings rock formations rocks rocky rough safety security shipping ships strength strong support support legs textures tidal alone bare blackpool cloud coast coastline consider contemplate dawn distance distant empty England english exercise Great Britain landscape lone loneliness lonely one shore single sky space think thought vacant walk walker