Launching out of Rosehearty & heading West to near Pennan, made famous in the film "Local Hero", there is a cave of around 4m in width & 60m in length, with one branch off leading to a dead end, it extends through a cliff, exiting the other side. It is very nice on the North side always with plenty of seals buzzing in & out, whether or not you see them depends on you looking in the right direction at the right time. Another cavern lies to the East on the North side, which extends back about 30m.