accommodation apartment-blocks architecture black-and-white block-like blocks building buildings condo condominium contrast contrasting costly expensive flats greyscale height high highrise highrise-accommodation homes Hong Kong modern monochrome multi-storey multi-story park pedestrians people perspectives population pricey skyscraper tall tower tower-block towering trees units value views wealth wealthy windows women beach foliage green greenery Hong-Kong property residential-area sand shrubbery shrubs tower-blocks urban-area vegetation garden hut lean to oysters shells