Kellerai Kaltern – Schiava Specialists Kellerai Kaltern (Cantina Caldaro) is the largest cooperative winery in northern Italy’s Alto Adige (Südtirol) region. It’s in Kaltern an der Weinstraβe (Caldaro sulla strada di vino). Its long name shows its proximity to Kalterersee (Lago di Caldaro), the region’s largest lake. The name also appends the regional wine route, which winds 150 km through …