Ever since the Neolithic period, humans have kept on improving the numerous natural ponds that they came across all around the Causse. They took advantage of these small land depressions called sotch or doline that provided essential water supplies to ensure the sheep watering, but were also used as laundry places or fish ponds, although their clayey bottom have always posed problems with leakage.In the Occitan language, the word lavanha refers to all kinds of ponds whether natural or hand built, whereas at the PNRGC, we have chosen to keep the word lavogne, or lavagne to designate ponds with paved bottoms, for they have witnessed the development of pastoralism over the 19th century. (source PNR Grands Causses).