The calbotada (chestnut roast) Food and drink · Rozas de Puerto Real, Sierra Oeste, Madrid Image of Rozas de Puerto Real, not of the place itself. On All Saints' Day the locals roast chestnuts in the countryside, a custom that gives the day its name. The chestnut has for centuries been one of the pillars of the local economy, along with rye and the potato. 1 de noviembre Photo: Dirección General de Turismo. Consejería de Economía e Innovación Tecnológica. Comunidad de Madrid. (CC BY 3.0 es) What to see and do in Rozas de Puerto Real