twenty-meter-lock wallpaperProviderpixabayResolution3155 × 3970Aspect ratio0.79:1AuthorhpgruesenSourceOpen original page Download wallpaper Available sizesPreview119 × 150Web508 × 640Large3155 × 3970Tagstwenty-meter-locklock chamberupper gateslovakiagabcikovodanubedanube side channeltransport systemwatersship