This 30-story cluster of eight hexagonal glass office towers (1990, C.W. Kim) lights the downtown skyline by night with the glow of emerald-green neon. The complex includes the Wyndham Hotel, whose 100ft-high atrium is dominated by a hanging green glass sculpture, Flying Emeralds (1990), by Richard Lippold, creator of the baldachin that hangs in St. Mary's Cathedral in San Francisco.