This atmospheric ruined 13th-century Augustinian church sits on a tiny peninsula in Lough Conn. The cloister is well preserved, as is the chancel with altar and piscina, a stone basin used for disposing of the water used during Mass. An oratory of massive stone walls in fields adjacent to the abbey stands on the site of a church founded in the 6th century. It’s known locally by the marvellous tongue-twisting name Templenagalliaghdoo, which means “Church of the Black Nun.”