The complex includes a 12th century Romanesque church, dedicated to Santa Maria di Mirteto, at the time dependent on the Badia di San Michele alla Verruca. The building remained active until the 18th century, becoming a private oratory in 1712. Currently it is in a state of ruin, but with well-preserved walls and altar. It was the seat of a fifteenth-century Madonna della neve, now present in the church of Asciano.
The rest of the buildings, including houses, ovens and cellars, some of which much more modern, are in a state of decay and unsafe; access is prohibited. Note the area surrounding the small uninhabited village, as it was once used to cultivate from the morphology of the land, also note the presence of an orchard now bare but still with some plum trees excellent to eat.
The toponym derives from the presence of myrtle plants in the area, at least during the period in which the monastery was still inhabited.