Clos, from the French for Closure or enclosed, is a walled vineyard used to protect the grapes from theft as well as improving the mesoclimate. Often founded by Cistercian monks. The word is often used in the name of famous wines even when the wall no longer exists.
Bordeaux: Château Léoville-Las Cases, Clos Haut-Peyraguey, Clos Fourtet, Clos des Jacobins, Clos de l'Oratoire, Clos de Plince, Clos Saint-Martin
Burgundy: Clos Napoléon (Fixin), Chambertin-Clos de Bèze, Clos de Tart, Clos des Lambrays, Clos de la Roche, Clos Saint-Denis, La Romanée together with La Romanée-Conti, Clos de Vougeot, Clos des Réas (Vougeot), Corton-Clos du Roi, Clos des Ursules, Clos des Mouches (Beaune), Clos des Épeneaux (Pommard), Clos du Val (Auxey-Duresses), Clos des Chênes (Volnay), Montrachet
Champagne: Clos des Goisses (Aÿ), Clos du Mesnil (Le Mesnil-sur-Oger; see Champagne Krug)
Alsace: Clos Sainte-Hune in Grand Cru Rosacker (Hunawihr), Clos Sainte-Odile (Obernai), Clos Saint-Urbain (Turkheim)
Loire: Clos de la Coulée-de-Serrant, Clos du Papillon (Savennières), Le Grand Clos (Bourgueil)
Rhône: Clos des Papes, Clos du Mont-Olivet, Clos de l'Oratoire des Papes (Châteauneuf-du-Pape)
South West France: Clos La Coutale, Clos de Gamot, Clos Lapeyre, Clos Triguedina (Cahors)
Switzerland
Vaud: Clos des Abbayes, Clos des Moines (Dézaley), Clos du Paradis (Aigle), Clos du Rocher, Clos des Rennauds (Yvorne)
Valais: Clos Grand Brûlé, Clos des Montibeux (Leytron), Clos de Balavaud (Vétroz)
Rheingau: Hattenheimer Pfaffenberg and Steinberg (Eberbach Abbey), Neroberg (Wiesbaden)
Rheinhessen: Schlossmühle in Heidesheim, Niersteiner Glöck
Napa Valley: Clos Du Val, Clos Pegase
Stellenbosch: Clos Malverne
Valle de Guadalupe: Clos de Tres Cantos
Clos (vineyard) Wikipedia (Text) CC BY-SA