L'anneau de vitesse

About

The French for 'speed oval' is an outdoor sports come in Albertville, France. It hosted speed skating events at the 1992 Winter Olympics. The stands, which remain present, were constructed as an airfoil from aerospace designs. The ice was made using 70 km (43 mi) of piping using R32 and strand refrigeration to cool the track to between -5 and -8 °C (23 and 18 °F) with 4 cm-thick (1.6 in) ice. Before this the surface was covered with 1.20 m (3 ft 11 in) of base sand in order to lay down the piping. The track serves todays as a multipurpose stadium used for athletics and football events.

References: 1992 Winter Olympics official report. 84–7. (in English and French)