The Leth winery is one of the leading examples of terroir expression in the Wagram. This family winery is located in Fels, directly on the terraces of the Wagram River. The deep löss soils are excellently suited for Grüner Veltliner, and it is no coincidence that half of the area under vine is planted with this variety. The Leth family is respected for their work sustaining indigenous varieties. They collected grape varieties previously grown in Austria and planted Austria's first living grape variety museum, which showcases approximately 150 ancient grape varieties, most of which had almost died out, others of which had never gained any major recognition, while a few had never been cultivated in practice. Today, Franz Leth Jr. has reinvented the winery through modernization, dense planting, and a pledge to employ sustainable viticulture. As if that weren't enough, he is committed to demonstrating that his single-vineyard wines are capable of developing with 10 to 30 years of bottle age.