In January 2016, the federal government of Germany applied for the status of World Heritage Site for two valleys with six caves named Höhlen der ältesten Eiszeitkunst (Caves with the oldest Ice Age art). The site would encompass areas in the Lonetal (valley of the Lone) and the Achtal (valley of the Ach) both in the southern Swabian Jura. The former includes the caves Hohlenstein-Stadel, Vogelherd and Bocksteinhöhle, the latter Geissenklösterle, Hohle Fels and Sirgenstein Cave. Each valley would contain a core area of around length, surrounded by a buffer zone of a least width.