In the heart of La Défense, this huge concrete arch in the shape of an empty cube, weighing 300,000 tons and 110m wide, is the work of Danish architect Otto von Spreckelsen. Major restoration work began in 2015 and granite replaced the damaged marble, adding new light. From the roof, reopened in 2018 thanks to scenic lifts, the view over Paris is breathtaking! Admire the city's historical axis, which takes in the Louvre, Place de la Concorde and the Arc de Triomphe.