The Käferberg vineyard overlooks Langenlois and is to Grüner Veltliner what the Heiligenstein vineyard is to Riesling - world famous. The roots of the 62-year-old vines grow deep in a very rocky soil and bring a special saltiness in the wine. It is a sunny vineyard, but also very windy. The vineyard occupies a warm, sheltered site between 300 and 345 meters above sea level, with a southern and southeastern exposure. The soils are variable, with different underlying bedrock: within a small area one can find crystalline rocks such as amphibolite, gneiss, and mica schist, alternating with much younger clay marl, sands, and rare gravels that were deposited in the ancient Paratethys Sea 16 million years ago.