One of the great attractions of Inishmore (Inis Mór, “Big Island”, but often referred to simply as Árainn) is its topography, stark, simple and easily appreciated. Sheer cliffs run the fourteen-kilometre length of its south coast, lashed at their base by the relentless Atlantic, while their tops offer an ethereal panorama, the echoing wall of the Cliffs of Moher to the southeast, and to the north across Galway Bay, the Connemara Mountains, tinged with green, purple and gold. The land declines northwards in a geometric pattern of grey stone, the parallel grooves of its limestone pavement overlaid by ten thousand kilometres of dry-stone walls, which parcel up man-made fields, painstakingly nurtured out of sand, seaweed and what handfuls of soil there are. There’s more greenery and a smattering of villages towards the sheltered north coast, which is lined with rock pools and several sandy beaches.

This landscape is strewn with a wealth of spectacular dry-stone ring forts, notably Dun Aengus, and fascinating early churches. Consequently, and with frequent bus and boat links to Galway city, Inishmore receives crowds of day-trippers in the summer and is the most tourist-oriented of the Arans, now even boasting a branch of Supermac’s, Ireland’s very own burger chain. However, you really need two full days to visit the historic sites, which will also allow you time to soak up the scenery, enjoy the relative quiet of the evenings here and even have a swim at beautiful Kilmurvey beach.

Signposted to the south of Kilmurvey, Dun Aengus is by far the Aran Islands’ most compelling ancient site, a semicircular fort of three concentric enclosures, hard up against the edge of sheer, ninety-metre sea cliffs. From here, you can see Kerry Head, northwest of Tralee, on a clear day and occasionally Mount Brandon on the Dingle Peninsula – and if you’re truly blessed the island of Hy Brasil to the west. The fort is named after Aengus of the Fir Bolg, a legendary ancient race, who were said to have been of Greek origin and to have ruled Ireland for 37 years, before being conquered by the equally mythical Tuatha Dé Danann.

From Dun Aengus, you might be lucky enough to see the famous mirage known as Hy Brasil (after which the South American country was supposedly named), which appears in the sea to the west as a mountainous island. Local folklore represents this mythical land variously as the island of the blessed, the Garden of Eden, Tír na nÓg (the land of eternal youth), the Isle of Truth, of Joy, of Fair Women and of Apples. In the early twentieth century, islanders believed it appeared once every seven years, but up until the mid-nineteenth century it was actually shown on some sea charts of the Atlantic. On the unforgiving, sea-battered Arans, it’s easy to understand how this fantasy of a prosperous paradise grew up.