"The synthesis of French caves." N. Castaret.
A little electric train takes you deep into the hillside, where you go up in a lift (or by steps) to a big central cavern, from which branch out two major galleries, leading to the various different caverns, 12 in all, with their underground pools and concretions of diverse and eccentric form. The crowning glory is the "Hall of Wonders", 2000 m2, where ultra-violet lighting renders the living concretions phosphorescent...