MAPS DATA GIS TOOLS GIS Mobile NEWS CERN in Numbers Some numbers about CERN and its "Patrimony" Land and sites : 625 ha of land made available by the Host States (France 515 ha, Switzerland 110 ha). 16 fenced sites covering a surface area of 213 ha (France 163 ha, Switzerland 50 ha). Meyrin site : 79 ha - Prevessin site : 83 ha 23.3 km of fencing. Buildings: About 700 buildings of all sizes covering a total footprint of 425 000 m2. About 274 barraks (huts, modular buildings and maritime containers). Underground Works: 325 underground structures (works) including 50 shafts. 160 service galleries totaling 17 km in length. About 59 km of tunnel. Roads and green spaces: 30 km of roads covering a total area of 649 000 m2 and 6 500 parking spaces of all types (including the Globe Car Park). 117 ha of green spaces. Premises (rooms): 1 900 floors. About 16 800 premises (excluding underground) covering a total surface of about 613 000 m2.