Best High-Style "Green" Building (2007)
Signature Centre at Denver West
With fins on the roof reminiscent of a cool '50s cruiser, the swank, sleek Signature Centre presents a striking silhouette against the sky. But this building has far more going for it than flashy good looks: It's also environmentally friendly, designed by architect Binh Vinh and developed by Aardex to meet LEED certification. Its many ecological features -- including warmer air conditioners and individual ventilation and lighting systems that are switched off when not in use -- not only look good, but they do good, too.