So called tensile structures in architectures are indeed minimal surfaces. Popular examples are
- the Olympiastadium in Munich: http://upload.wikimedia.org/wikipedia/commons/f/f0/Olympiastadion_Muenchen.jpg
or - the former Millenium Dome in London: http://upload.wikimedia.org/wikipedia/commons/6/6f/The_O2_Arena%2C_entrance.jpg
