Some stadia, such as the one at Dortmund in Germany or Ibrox Park in the UK (Figure 5.4) simply dodge the problem: four rectangular ‘sheds’ are placed on the four sides of the pitch and the corners are left as gaps. This saves money and helps avoid awkward structural and planning prob- lems, and in the case of natural grass pitches the ventilation provided by the open corners is very helpful; but nevertheless the effect is visually unhappy and the geometry sacrifices potentially revenue-earning corner seating, as pointed out in Section 11.3.4. One solution is to infill the corners with towers, with the side and end stands spanning between them. The stadium in Genoa (architect: Vittorio Gregotti), which is in tight urban surround- ings, is an example of this approach. Such tow- ers could accommodate offices or other functions depending on the local context.