accumulated accumulations aged calcium-carbonate candle-shapes caves ceilings coloring colors colouring colours columns crystallisation crystallise crystallization crystallize deposits distinctive edge edges floors formation forms icicle-like minerals old Particles pillars pointed shape shaped shapes Singapore slow slow-growth slowly smooth Stalactite stalactites stalagmites subterranean surface surfaces texture textures unusual white abstract background blended blue-gray blue-grey bubbles bubbling bubbly color coloration colored colour coloured curved curves decorative design details flow flowing interconnected interlinked interwoven light liquid liquidy merging patterns perspectives rounded style surfacing textured thick thin vibrant wallpaper water watery angles art artistic backdrop circles colorful colourful decoration depth detailed folds image intermeshed intricate intricate-patterns kaleidoscopic-patterns lines mandalas multicolored multicoloured points pulsating radiating surfaced appearance appearances bright connected connection contrasting horizontal interlaced intertwined linear lined rainbow-colors rainbow-colours ripples rippling stripe stripes stripy undulated undulating waves wavy bundle circular dark glowing hollow lighting multi-colored Multi-Coloured patterned shiny tubes tubular black brown chain-mesh contours Designs geometric geometrical gold gray grey links mesh metal metallic orange purse reflections reflective repetitive shades silver uneven variations yellow brilliant corners cream detailed patterns images kaleidoscopic patterns mandala rays sharp blue