circular corner dark diffused-light gray grey handrail inside interior intricate light limited patterned patterns shadowy silhouette spiral spiral-staircase spiraling spiralling staircase stairs steps structure sturdy turning turns window wrought-iron architecture spiral staircase step ironwork lighthouse spiral stairs spiral step stairway angled angles architectural-elements ceiling greyscale lighting monochrome reflections shiny upstairs blue brown colored colors coloured colours dark blue footpath light blue mosaic orange pavement rainbow red textures white yellow flooring polished sepia abstract air cigar fire incence organic smoke spirals swirl basket basket weave dried grass spiral pattern. straw weave color colour concept creeper green pink plant tendril texture vine