The Transbay Transit Center in downtown San Francisco, designed by our friends at Pelli Clarke Pelli Architects, was conceived as a state-of-the-art multimodal transit station. It links 11 transit systems and more broadly connects San Francisco to the broader Bay Area, California, and the rest of the United States, and features a 5.4-acre landscaped rooftop park, as well as vaulting light-filled interiors in the style of Grand Central Terminal and London’s Victoria Station. It is visibly characterized by an undulating wall which floats above the street on steel columns, and features, at street level, shops and cafes. But the centerpiece of the project is undoubtedly the park, which has over a dozen entry points, and, potentially, bridges linking it to surrounding buildings. Active programs include an amphitheater able to accommodate 1,000 people.