Neandertal (valley) most of the limestone and dramatically changed the shape of the valley. It was during such a quarrying operation that the bones of the original Neanderthal man were found in a cave known as Kleine Feldhofer Grotte. Neither the cave nor the cliff in which the bones were located still exists. During the 19th century the valley was called "Neandershöhle" (Neander's Cave), and, after 1850, "Neanderthal". It was named after Joachim Neander, a 17th-century German pastor. "Neander" is the Greek translation of his family name "Neumann"; both names mean "new man". Neumann lived in nearby Düsseldorf and loved the valley
Germany Valley effects upon the suitability of the cave as an endangered bat species hibernaculum. In 2002—after prolonged negotiations with Greer—the USFWS, West Virginia Department of Natural Resources (WV DNR), WV DEP, caving organizations and local landowners, the Germany Valley Karst Survey (GVKS) was formally contracted to survey the extent of the Hellhole cave system. In accordance with USFWS requirements regarding endangered bats, all annual survey activities must be completed within a 16-week window during the summer months. Since that time, the known extent of the cave has expanded to 24.9 mapped miles (40.1 kilometers) and 519 feet (158.2 m) of depth.