accommodation angles appearances architectural architectural-elements architecture balconies balcony box-like buildings city-scapes city-views colors colours concrete contemporary contrast contrasting costly curved distance distant elements expensive exterior external glass heights high high-rise holidays hotel hotels light linear lines modern multi-storey multi-story perspectives recessed skyscrapers surface tourism tourists views walls wealth windows city apartment-blocks apartments complex curves Designs detailed distinctive flats height highrise metal modernistic multi-storeys multi-stories neighbourhood open open-windows palms plain straight structured structures style supports tall tinted-windows tower-blocks towering tree units angled botanical-gardens clouds columnless-glasshouse conservatories conservatory conservatory-complex construction controlled- temperature curving dome domes energy-efficient flower-dome foliage garden gardens glasshouse greenhouse heating high-tech horticultural horticulture hothouse indoor-gardens lighting optimized-conditions overcast palm-trees plants shrubbery shrubs Singapore steel structure sustainable-building-technologies transparent trees ventilation visibility warm-growing-environment all-weather-space atmospheric-humidity cloud-forest cooling regulated-climatic-conditions