blue sky wallpaperProviderpixabayResolution4496 × 3000Aspect ratio1.50:1AuthorChrisJonesSourceOpen original page Download wallpaper Available sizesPreview150 × 100Web640 × 427Large4496 × 3000Tagsblue skyborough marketclock towercloudsflagglasshigh risethe shardskyscrapersouthwark cathedral