Gudenus Cave, below the Hartenstein Castle northeast of Krems (Lower Austria). The lower cultural layer dates back to the Ice Age about 70,000 ago, when Neandertal Man hunted mammoth, woolly rhinoceros, reindeer, wild horses, cave bears and cave hyaenas in the area. The upper cultural layer is thought to belong to the Magdalenian, between 20,000 and 10,000 B.C. The most important finds are a 4-cm-long bone whistle (oldest musical instrument in Austria) and the engraved drawing of a reindeer head on eagle's bone.
Literature#C. Neugebauer-Maresch, Altsteinzeit im Osten Oesterreichs, 1993.