The Wachau has its OWN wine classification system — Steinfeder, Federspiel, Smaragd — that predates, ignores, and outclasses Austria's national system. Invented in 1983 by four guys furious that wines from other regions were being sold as 'Wachau,' they called it a 'celibacy vow.' Smaragd is named after the emerald-green lizard that suns itself on these warm stone terraces — that lizard is now endangered. At Domäne Wachau Vinothek (Dürnstein 107, 3601 Dürnstein), ask for the 6-wine tasting (€10, credited back on purchases over €80) and tell the staff you want to taste one of each tier — Steinfeder, Federspiel, Smaragd — in Grüner Veltliner. This is a 300-year-old Baroque cellar cooperative owned by 250 families, voted No. 1 winery in Europe, No. 3 worldwide.
🔄 BACKUP: If the Vinothek is closed, Heuriger Hamböck in Stein (Kellergasse 31) offers tastings from their 600-year-old cellar.