A natural granite outcrop shaped like a mushroom, over 2 metres high, featuring megalithic engravings in the form of small cup-marks (“covinhas”) and always covered with small loose stones.
It is considered a menhir or fertility stone, later Christianized and transformed into a “station” along the drought processions that once took place between the Hermitage of Nossa Senhora do Rosário (Our Lady of the Rosary) and the village of Aldeia do Mato (present-day São Pedro do Corval).
According to an ancient tradition that still survives today, unmarried women perform a pagan fertility ritual here on Easter Monday, throwing a stone onto the menhir and consulting it about their future marriage. Each failed throw represents one additional year of waiting.
This is a rare example of idolatry, demonstrating a clear continuity of fertility-related cults, which in historical times were often associated with dolmens, menhirs, or simple stones such as this one.