Buttermere hills hot lake Lake district scenery sky summer trip View point water Cumberland cumbria England island islands Keswick landscape mere mountains national park peace tranquility uk united kingdom unspoilt view North West changeable english fell fey Great Britain hillside moody natural nature peak reed temperamental varied vary mountain rock field grass green hill meadow trees background beauty clouds Howgill Fells park skies cloud grassland Natural landscape plant slope tree Body of water dawn dusk horizon loch outdoor reflection reservoir shadow silhouette sunrise sunset twilight water resources bluebells flower footpath spring track trail wild