Inishmor is the largest of the Aran Islands in Galway Bay in Ireland and has an area of 31 square kilometres . Inishmor has a population of about 840, making it the largest of the Aran Islands in terms of population. The island is famous for its strong Irish culture, loyalty to the Irish language, and a wealth of Pre-Christian and Christian ancient sites including Dún Aengus, described as "the most magnificent barbaric monument in Europe" by George Petrie.