as straight as the canal before. The canal aids in one's understanding of water processes and changes in time. Markers made by soil mounds (these also break up the culvert form) allow the depth of the water to be read by the visitor to the site. Here the visitor is able to understand on a seasonal basis the process of the site and mark their experience of the park by how high the water was. Finally, Piazza Metallica also works with ideas of temporality and memory: the landscape architects took 49 steel plates that formerly lined the foundry pits at the site (Diedrich, 70) and installed them to mark a gathering place, intended for events and performances. However, the steel plates are not meant to last; rather, they will gradually erode and decay, portraying the natural processes occurring in the site (Steinglass, 129). In a way, this piazza represents the site as a whole: as the plates decay (like the other steel on the site), a succession of plants will grow between them. Plants will eventually fill the space, with the remains of the rusted steel among them. Precursors of Landschaftspark Peter Latz gained his first important experiences in dealing with derelict industrial sites in 1985, when designing the "Harbour Island", a public park on a destroyed harbour site in Saarbrücken (Weilacher, 82). However, the concept of remaking an industrial site are not new. Rather, several landscape architects have worked within this realm. Works such as Alphand's Parc des Buttes Chaumont that were constructed in old quarries do not hide the past of the site, but rather work to enforce it. Richard Haag's Gas Works Park in Seattle was an important predecessor to the Landschaftspark. Rather than removing the gasworks, the design allowed parts of it to stay in place and created a mound where the soil was being remediated, allowing people to understand the process of change. Peter Latz, takes these ideas and pushes them further as he uses materials on the site to show their transient nature as they change and decompose, transforming into something else. Landschaftspark at Duisburg Nord had a clear intention of using the site to develop its program. Within this context, each programmatic element is given a specific identity that illustrates time, while showing change in different ways. Each visitor is allowed to experience the park in their own way and create their own