Innisfallen is a small island in Lough Leane, about a 15-minute row from Ross Castle. It contains the ruins of a monastery established around 640 AD, including a Romanesque doorway from the twelfth century and the remains of a later oratory. The island is entirely wooded with ancient oaks and the ruins sit in clearings among the trees.
Boats to the island depart from Ross Castle jetty — a boatman rows you out and waits while you explore. The trip takes about an hour including the crossing. There is something genuinely atmospheric about arriving by rowing boat at a tree-covered island with a 1,300-year-old religious settlement in the middle of an Irish mountain lake.