Image Number 4 for United States Patent #7985142.
An indoor ski slope (1) comprises a continuous peripheral wall (2) and a floor (3) which extends obliquely downwards relative to the peripheral wall (2). A roof (5) is arranged on the peripheral wall (2). Furthermore, a layer of snow is provided on the surface of the floor (3), as well as a cooling installation (9) for cooling the floor to a temperature which is suitable for maintaining the layer of snow. The surface of the floor (3) is at least partially curved concavely.