accommodation angles angular apartment blocks apartments appearances architecture balconies balcony box-like building city complex contrast contrasting dark Designs detailed distinctive elements exterior external glass heights high high-rise light linear lines metal modern modernistic multi-storey multi-story plain quality short-term straight structures style supports tall tower towering units value views windows apartment-blocks art-deco condo condominium façade flats height heritage historic patterns protection safety sepia valuable boxed concrete highrise red shield shielded shielding squared structured buildings curves multi-storeys multi-stories neighbourhood open open-windows palms tinted-windows tower-blocks tree abstract angled appearance architectural contemporary corners edged edges framed frames geometric geometric-shapes gray grey patterned perspectives sharp sharp-cornered sharp-corners Singapore straight-up-and-down surface surfaces textured textures wall walls