Berlin is an example of a city in which the principle of sustainable development has been consistently carried out for many years. The result of implementation of this principle is, among others, the rebuilding of the city’s central parts and creating public spaces of a high standard. In the following article I present the newest example of a implementation of urban open space in the city-Park am Gleisdreieck. The park was created on the grounds of revitalized post-rail areas which lie on the border of two districts of Berlin: Kreuzberg and Schöneberg. It occupies an exceptional place in the system of the city’s public spaces. This is because it constitutes a green continuation of the central areas of Berlin – it is an extension of Tilla Durieux Park in the Potsdamer Platz complex and at the same time it is a part of one of city’s two main green axes. The park is distinctive because of the high quality of applied spatial solutions and extraordinary care to retain the elements that constitute the place’s identity. It is also an example of effective cooperation of designers, city governors and inhabitants.