Jardins du Trocadéro (Gardens of the Trocadero) are an open space area designed by Roger-Henri Expert, bounded to the north-west by the wings of the Palais de Chaillot and to the south-east by the Seine and the Pont d’Iéna. The entire site was formerly the garden of the original Palais du Trocadéro, laid out for the Exposition Universelle in 1878.
The present garden has an area of 93,930 square metres, and was created for the Exposition Internationale des Arts et Techniques dans la Vie Moderne (International Exposition dedicated to Art and Technology in Modern Life) in 1937.
The main feature, called the Fountain of Warsaw, is a long basin, or water mirror, with twelve fountains creating 12-metre-high columns of water; twenty-four smaller fountains 4 metres high; and ten arches of water. At one end, facing the Seine, are twenty powerful water cannons, able to project a 50-metre jet of water. Above the long basin are two smaller basins, linked with the lower basin by cascades flanked by 32 sprays of water 4 metres high. In 2011, the fountain’s waterworks were completely renovated and a modern pumping system was installed.