accommodation angles apartment-blocks apartments architecture balconies buildings complex concrete contrasting curves Designs detailed distinctive elements exterior external flats glass height high high-rise highrise light linear lines metal modern modernistic multi-storeys multi-stories neighbourhood open open-windows palms plain straight structured structures style supports tall tinted-windows tower-blocks towering tree units views windows airy atrium bright ceilings central circular cruise-liner cruise-ship curved decks ELEVATORS floating-staircase flooring floors interior leisure levels lifts luxury onboard open-space passengers perspectives piazza-style railing railings rails relaxation relaxing safety secure soaring space spacious staircases stairs tourists transport travel