San Mariano is exactly in front of the village of Solomeo. In the most ancient part of the fortification, there is the only access door to the castle, made of calcareous stone, with a round arch inside and a pointed arch outside. Walking to the main road, you arrive to the heart San Mariano, following a path among the typical little houses of the town, made mostly in travertine, also because of the proximity with the cave of S.Sabina- Strozzacapponi, from which they used to extract stone since the Etruscan age.
The church of Santa Maria Assunta was renewed during the second part of the 19^th century.