The pastureland approach to the preservation of historic sites did not extend to the third of the forts, which has a "museum" (a la Dingle Peninsula) and an admission fee to walk to the fort. Which has a couple of signs on it that say "Please do not climb on our national heritage." The museum did have some cool information, even though the featured pictures of a circle fort was from an Arctic Scottish island rather than one of the local specimens. There we learned that our difficulty in approaching the fort was intentional on the part of the builders--between the second and third walls, they planted big stones at a 45 degree angle so it's impossible to walk straight up.    Co Clare, Ireland -- 7/17/2014