This huge botanical complex is set in a disused kaolin quarry (15ha, 60m deep). The plants in the park at the bottom of the quarry (5ha) belong to a temperate climate like northern Europe's. Against the wall, two enormous greenhouses (geodesic domes) made from the most high-tech materials recreate the warm temperate climate of the Mediterranean basin, or the humidity of the tropical rainforest, where teak, mahogany and cocoa trees flourish in the damp heat.