The rammed-earth houses of the Plaza Mayor Curiosity · Frechilla de Almazán, Almazán, Soria Image of Frechilla de Almazán, not of the place itself. Around the square several rammed-earth houses are preserved with double-leaf doors, handmade knockers and good ironwork: a catalogue of vernacular earth architecture that in Soria is disappearing fast. Photo: LBM1948 (CC BY-SA 4.0) What to see and do in Frechilla de Almazán