You're looking at 3,000 km of DRY STONE WALLS across Valais, many 100-150 years old, some from the 17th century. In Salgesch, terraces climb slopes steeper than 30% (the threshold where Swiss government pays CHF 5,000/hectare subsidies for 'extreme viticulture'). No mortar — just stones stacked directly on each other. The south-facing slopes are 1.4–5.6°C warmer than north-facing, which is why 70% of Salgesch is Pinot Noir. Walk the vineyard trail, stop at any terrace, touch the dry stone wall with no cement, then look UP the slope and count 10-15 stacked levels of hand-built, hand-harvested terraces.
🔄 BACKUP: Visit the Salgesch Wine Museum (Museumplatz, Wed-Fri 2-6pm, Sat-Sun 11am-6pm, guided tours CHF 150 for groups). Thirteen rooms detail the history, terroir, harvest, cellaring, and the know-how of the winegrowers who built these impossible slopes.