Today, there are few industries left in our cities. Industrial areas that are located in urban settings close to water or city centers are often replaced by housing. In my thesis I want to explore how such industrial site located in an urban setting can be transformed into an industrial park where the industrial structures are saved. By approaching this type of environment in a positive manner, I wish to highlight the potential aesthetic and functional value in the existing industrial structure. Through the transformation and design of an existing industrial site I will convey the previous use and history of the place. The wastewater treatment plant, Kungsängsverket, is located in the district of Kungsängen in the southern part of Uppsala. Kungsängen is an area that consists of industries and offices, however in the last couple of years it has begun transforming with the establishment of new housing close to the city centre and Fyrisån. Kungsängen is the first planned industrial area in Uppsala, since the late 19th century. When approaching Uppsala from the south several of Kungsängens industrial buildings are made visible as a part of the city silhouette. The wastewater treatment plant is the largest continuous industrial structure in the district of Kungsängen. It has gradually expanded since its establishment in the 1940s. This area works well for the application of an industrial park this due to the fact that the layout of the plant and its structures create a continuous area close to the city centre. The treatment plant is located in the first industrial area that was planned in Uppsala which now faces a major transformation. The history of Kungsängen can be conveyed by accentuating the industrial structures in a public park. In my design proposal for the park it is my goal to create a unique park in Uppsala, a park that complements the traditional parks situated on the west side of Fyrisån by its park uses and design expressions. I want to emphasize the meaning of industrial history in Kungsängen in general and in Kungsängsverket in particular and how it has affected the development of the city of Uppsala. The park will become a place where technology, industrial history and aesthetics unite. The park will also offer activities that currently are missing in other public places in Uppsala. The thesis consists of three main parts: The first part, industrial environments in change is based on written material on existing transformations of industrial land. Three examples of transformations from industrial sites to industrial parks are further compared and discussed. Part two, kungsängen and the treatment plant, provide a background to the district of Kungsängen. This acts as a background to the area in Kungsängen which I make a design proposal for in part three. The municipality of Uppsala has recently developed a program for Kungsängen and it is put in relation to the idea for my thesis. A briefing of the industrial history of Uppsala with emphasis on Kungsängen and the treatment plant gives a historical background to the site. Methods used in this section are literature studies and site visits with a tour of Kungsängsverket treatment plant. Part three, design, consists of the design proposal that transforms the treatment plant in Kungsängen to a public park. Methods used here are site visits, inventory and analysis of the site followed by sketching and design reviews throughout the design process.