These spark chambers were displayed in CERN's permanent exhibition, Microcosm. These were particle detectors in which the tracks of particles would be seen by sparks created along the particle's path.
<p><ol><li>Ophrys apifera, or bee orchid: the most widespread variety at our site.</li><li> Anacamptis pyramidalis or pyramidal orchid: another common variety, with close to 2500 plants counted in 2005.</li><li>