The 10-ton Sacred Stones (Piedras Santas) - part of the Ara Solis temple to the sun.
"From the diaries of a 16th century German pilgrim Erich Lassota, we read: “…at the Fisterra headland summit, at the mountain called Facho, we can find the Piedas Santas. The Holy Stones are two big and almost round stones on which the people conferred certain gifts. … These stones, even that you can’t move them back using several oxen teams, are easy to move with a finger, a fact that I established myself.”
This site was allegedly the site of an early pagan rite whereby the movement of the stones proved (or disproved) the virginity of a priestess before she was allowed to perform certain ceremonial duties. The phrase ‘to put her over the stone’ was a reference to this ordeal."