Very clever who could exclaim upon arriving on the limestone plateau of La Romieu: “Ah! What a beautiful karst…” And yet, here, as in all karsts, the rivers are invisible; they circulate in underground networks that local speleologists have tirelessly explored since the 50s. Along this karst path, you will discover sources that are not springs, the tiny entrance to the second longest cave in the department, you will see sinkholes, a chasm, a piece of lapiaz. In short, you will follow the path of groundwater without setting foot underground. Welcome to the karst trail of La Romieu and Gazaupouy…