Since the first days spent in Villa de Leyva, we were curious about the frenetic activity of some masons who, in open countryside, were building a house of unusual aspect, perhaps not particularly nice, but above all burning it. Now we discover that what seemed a game it’s in reality a project of bioarchitecture developed by Octavio Mendoza, a boyacense architect. The concept is very simple: the argillaceous soil, found in large amount directly in the construction place, is used as unique material to model the building. Piece after piece it’s given shape to the structure, that at last is burnt in order to confer it mechanical resistance. The result is a low-cost house of adobe, eco-sostenible, with optimal thermo-regulation properties, of minimal environment impact and antiseismic. The plan seems so brilliant that it has received attention in Europe too, for the moment in Spain and France. The idea is suggested by the example of the indigenous population, in particular the Andean one, that used adobe (a mixture of mud and straw) in order to construct its own buildings for thousands of years.