abstract angles appearance architectural architecture backdrop background cascade cascading color colour decoration decorative drops feature feature-wall gray grey ornamental rectangles rectangular rocks shaped shapes solid spray stone stone wall stones stonework surface surfaces textures varied wall water water-feature water-spray waterfall wet broad colors colours cool cooling dark downhill downwards edges fast-flowing flow flowing light moving multi-level multiple-levels park peace peaceful public reflecting reflections ripples rippling running steps stream streaming sunlight sunshine wide air-controls amenities bubbling high-volume hot-tub hot-tub-spa hydrotherapeutic-massage hydrotherapy jacuzzi jet-technology jets jetted-whirlpool large-tub low-pressure massage massage-jets outdoor outside pump-system pumps sanitized sanitizing small-pool spa spiraling swirl swirling warm warmed whirlpool balance blue blurred brook copy copyspace country countryside environment fall falling flora fresh gold green harmony HDR motion pure purity rain rapid river rock season seasonal space spate speed splash splashing spring summer tranquil weir white yellow zen full atmospheric-humidity ceiling circles circular curved curves curving decore descending design distinctive down down-pour downward drop droping glass high high-tech indoor-gardens inside interior lighting liquid long public-area skylight steel structure tall transparent unique ventilation visibility windows aquatic aquatic-plants bush darkness floating foliage grass greenery leaves lilly-pad plants pond reeds reflection rushes shade shadows texture textured water-lillies angled botanical-gardens cloud-forest conservatory conservatory-complex controlled- temperature cool-moist dome domes energy-efficient flowers gardens glasshouse greenhouse heating horticultural horticulture hothouse mountain optimized-conditions regulated-climatic-conditions Singapore sustainable-building-technologies tallest warm-growing-environment waterfalls