For most of the twentieth century, transatlantic aircraft simply had to stop here. Range was the limit, and the airport carved out of the flat boggy ground near Limerick was the last refuelling point before the Atlantic. So the name Shannon - which had meant a river since the Iron Age - came to mean a place in the air, a stamp in a passport, a bar full of jet-lagged Americans waiting for the connection to JFK. Longer-range jets made the stop unnecessary; the airport stayed, and so did the name. Today Shannon Region covers three counties - Clare, Limerick and Tipperary - half a million people, the lower half of the river's catchment, and most of the things people come to Ireland to see.
This was the kingdom of Munster - one of the four ancient provinces of Ireland, christianised from the fifth century with St Patrick among its missionaries. Its dynasties warred with each other, with the Vikings, and eventually with the Normans. In 1014 Brian Boru, born up at Killaloe on the Shannon, broke the Viking power at Clontarf. After a twelfth-century split, the kingdom divided into Deasmhumhain - South Munster, anglicised as Desmond - and Tuadhmhumhain, North Munster or Thomond. The English under King John pressed in, but only the Tudors of the sixteenth century established firm control, parcelling the old kingdom into the counties that survive today. Cashel was the religious centre, its limestone rock crowned with cathedral, round tower and chapel, all of it ruined by the Reformation and Cromwell.
The castle inventory runs to absurdity. King John's at Limerick, Castle Desmond at Adare, Knappogue rebuilt as Victorian medieval fantasy, Dunguaire picturesque on Galway Bay, Newcastle West going to ruin, Bunratty turned into a tourist banquet hall with mead and harp music. Most were smashed by Cromwell's army in the seventeenth century, the rest let go in the long Irish decline. Around Lough Gur in County Limerick a remarkable cluster of prehistoric sites - stone circles, wedge tombs, the kind of Neolithic landscape that does not advertise itself. Craggaunowen in County Clare has a reconstructed crannog, a fortified lake dwelling built much as the original Iron Age people built theirs. The past in this region is not behind glass. It is in the field, in the hedgerow, in the foundations under the modern bungalow.
Before the runways came the seaplanes. Foynes on the Shannon estuary in County Limerick was a major terminal for transatlantic flying boats in the 1930s and 40s - the rich, the famous and the merely lucky disembarking on the river to flash bulbs and press cars. The Foynes Flying Boat and Maritime Museum keeps the story alive, including the local legend that Irish coffee was invented there one stormy night to warm a planeload of passengers turned back to land. West of the airport the coast goes wild. The Cliffs of Moher drop two hundred metres straight into the Atlantic. Loop Head in west Clare is nearly as dramatic and somehow not on most tour itineraries. A resident pod of bottlenose dolphins lives in the Shannon estuary - sometimes you can spot them from the Shannon Ferry between Tarbert in Kerry and Killimer in Clare.
Up in north Clare the Burren stretches across two hundred and fifty square kilometres of stripped limestone - karst pavement, sinkholes, caves, and a flora that mixes Arctic, Alpine and Mediterranean species in a way found nowhere else in Europe. The Aran Islands offshore are geologically the same plateau, just sunk below sea level. Gaelic games run deep here: hurling especially, the game codified at Thurles in 1884 when the GAA was founded. There are over two hundred club teams across the three counties. Munster rugby plays at Thomond Park in Limerick - a stadium with a reputation for noise that visiting teams find difficult to overstate. The Ryder Cup arrives at Adare in 2026, the first time the tournament has come to Ireland since the K Club in 2006. Whether or not it changes anything about Adare's traffic problem remains to be seen.
Limerick is the only city in the region, set where the Shannon turns tidal - a Georgian street grid laid out on King John's Norman foundations, a place with the most amenities and the deepest history. The Wild Atlantic Way runs the coast from Cork all the way up to Donegal, and through the Shannon Region it passes the Cliffs of Moher, Loop Head, the Burren coast. The river itself remains navigable from the Atlantic up into Lough Derg and beyond, dammed at Ardnacrusha since 1930 but still the spine of the country. Drive any back road in this region and you will find what generations of travellers found: castles in ruin, abbeys in ruin, fields of stone walls, a pub at the crossroads, and somebody who will tell you the whole local history if you have an hour and a glass of something.
The Shannon Region centres on roughly 52.75 N, 8.77 W and covers Counties Clare, Limerick and Tipperary in Ireland's mid-west. Shannon Airport (EINN) is the major airfield, with US border preclearance and routes to Europe and North America; secondary general-aviation strips include Coonagh and Kerry (EIKY) to the south. Flying west along the coast, the Cliffs of Moher present a 200-metre vertical cliff line - an unmissable visual landmark. Lough Derg, the long lake at the region's northern edge, glints clearly from altitude. The Shannon estuary widens to a broad tidal sweep west of Limerick. Atlantic systems track in fast from the south-west; clear visibility windows are valued.