Actually I am not stretching the theme one little bit. The rock, which is located in the Millstreet County Park in Ireland, was the site of a hedge school.
A hedge school was a rural school in Ireland that existed mainly in the 18th century when catholic schools were forbidden under what were known as the Penal Laws, which placed severe restrictions on the rights of Catholics and "dissenters" (protestants who were not part of the Anglican church).
In the absence of a formal education system the hedge schools continued well into the 19th century. They did decline after the introduction of National Schools (primary/elementary schools) in 1831.
In reality most hedge schools were located in barns or in other places out of the elements. This one is relatively unusual