branch courtyard decorated decorative frond garden home house inner palm plant pot sanctuary Spain traditional tree Copenhagen Denmark greenhouse growing growth HDR palms park summer warmth white wood angled angles botanical-gardens clouds columnless-glasshouse conservatories conservatory conservatory-complex construction controlled- temperature curved curves curving dome domes energy-efficient flower-dome foliage gardens glass glasshouse heating high-tech horticultural horticulture hothouse indoor-gardens light lighting optimized-conditions overcast palm-trees plants shrubbery shrubs Singapore steel structure sustainable-building-technologies transparent trees ventilation visibility warm-growing-environment windows Balearic Islands bark bases majorca natural nature odd peculiar spanish strange trunk unusual approach architecture elements footpath green Moorish path rural stone walls cream flower flowers hang hanging madeira pendant suspend suspended pillars pink trunks verandah color colored colorful colors colour coloured colourful colours cool flora garden path grass ground-cover peace peaceful pebbles rocks shade shadows spiny sunlight