At night, the sleek faceted glass façade of the park hyatt seoul hotel, crowned band of white light from the lobby and lounge on the top floor, is dotted with the yellowish glow of the lights in the guest rooms. At street level, large sculptural boulders of rough Japanese aji granite break through the glass front wall, bringing the space of the street into the sparsely furnished gallery-like entrance area. High-speed elevators whisk customers to the 24th floor reception lobby, where the serenely composed museum ambience continues.