The Ronquieres Inclined Plane is a boat lift; the boat is set to float in a gigantic tub known as a caisson, which then rolls up a set of rails. Statistics: vertical lift/drop of 68 meters, track length of 300 meters, counterweight of 5,400 TONS. The control tower has a visitor center with an audiovisual presentation that explains the inclined plane s design, workings, and use.