imported document on the site 2013-12-01 and amended for the last time 2013-12-01
Most of the inhabitants of Lyon know that subsoil of the Croix Rousse and Fourvière is traversed by numerous galleries. Before the various prohibitions (and even after) to walk the subsoil of Lyon in the late 1980s, students were fond of underground walks. Moreover, there were few entries directly into schoolyards (now closed).