THE SKY AVENUE Visitors can now enjoy the largest terrace in Paris on the rooftop of the Grande Arche. It is has a 100 meters long footbridge stretching across it that provides beautiful views of all major historical monuments of Paris. The Grande Arche also provides an excellent view over France's largest open-air museum in the plaza of La Defense below. The exhibition space displays 69 monumental pieces, including Le Stabile by Calder and le Pouce by César. There is also a temporary interior exhibition.