The Towers of the Estena Nature · Navas de Estena, Montes de Ciudad Real, Ciudad Real Image of Navas de Estena, not of the place itself. Columnar quartzite formations aligned along a geological fault and produced by differential erosion, which can be seen from the Boquerón del Estena route. Photo: Juan Fernández (CC BY-SA 2.0) What to see and do in Navas de Estena