The area of the new sports arena in Novo Mesto is located on the site of the transition between agricultural and preserved natural open space. Cultivated terraces are less intrusive in the landscape because their surface is usually not entirely flat and the slopes between them are not very high. Their form is a consequence of field division of the land into wide and /or irregular particles and lumps, adapting themselves to the natural slope.The roof of the arena building is planned as part of this traditional terraced landscape, in order to improve the view from the centre of the city. The arena is almost completely dug in the terrain, which provides favorable climatic conditions in the building. The last terrace covers tribunes along the existing stadium. On the edges of the roof terraces lighting strips are formed to provide daylight and ventilation in the arena. Green strip terraces continue on the roof of the garage, where the existing building is enlarged for parking buses and extended in the two-levels car garage. The organization of the external area allows both the flow of the required number of people as the everyday use of the park. Trails in the forests of the hinterland have good connections to the external arrangement of the arena. Separate units are designed to function autonomously when others program units are not in use. Therefore, adequate access is provided to reach programs in use and restricting access to other areas.