Probably the best approach to the tower is to take the Métro to the Trocadéro station and walk from the Palais de Chaillot to the Seine. Besides fabulous views, especially when the Trocadéro fountains are in full force, you get a free show from the dancers and acrobats who perform around the Palais de Chaillot. The vast green esplanade beneath the tower is the Parc du Champs-de-Mars, which extends all the way to the 18th-century École Militaire (Military Academy), at its southeast end. This formal lawn was once a parade ground for French troops.