This unspoiled island with a fantastic name is located in the Shannon Estuary near Kilrush, and holds atmospheric monastic ruins dating from the 6th century. A high, round tower and several churches are all that is left of an extensive settlement that was founded by St. Senan. To visit the island, contact one of the boat operators who arrange the 20-minute ferry rides -- frequency depends on demand, and even in summer there may be only one trip per day. Or ask at the Information Centre (in Kilrush, just past the pier) when the next ferry departs. Here's an interesting little scrap of trivia associated with Scattery Island: Although it's a ruin, St. Senan's is what's known as a titular diocese -- meaning that the pope still appoints it a bishop, although they don't actually do anything. The current incumbent is also the bishop of Brooklyn.