On the road between Lhasa and Gongga Airport is the Tanva Carpet Workshop. The artisans here use handspun Tibetan highland wool to make both traditional and contemporary carpets using natural dyes. Even if you're not buying, it's interesting to see the whole carpet-making process from start to finish. Tanva makes the carpets that are sold in Torana stores in Beijing and Shanghai. Call ahead to arrange a visit.