Beyond the great canal stands the wall of the Grottoes with its rusticated niches, and above it the slope crowned by the copy of the Farnese Hercules. The canal, 875 metres long and hidden from the château by a dip in the ground, faces the Grottoes, whose statues of the rivers Tiber and Anqueuil were designed by Le Brun; the Hercules was installed by Alfred Sommier in 1891.