Earthenware jars of Colmenar de Oreja Curiosity · Colmenar de Oreja, Las Vegas, Madrid The town had as many as 35 jar kilns in the early 20th century, firing vessels more than four metres tall that fifteen men would manoeuvre inside with a net; the last local potter, Eugenio Crespo, worked until 1980. Photo: Zarateman (CC0) What to see and do in Colmenar de Oreja