Ringsend county Dublin is a Southside inner suburb which is located on the south bank of the River Liffey. Ringsend is just 14 minutes drive from the Merrion Hall Hotel. The Great South Wall Ringsend is home to the Great South Wall, the longest sea-wall in Europe, which extends from Ringsend 4 miles out into Dublin Bay. The wall connects The Poolbeg Lighthouse, which was constructed in 1767, to the Mainland. The Great South Wall construction was completed in 1795. The Lighthouse and The Great South Wall are a popular walking destination. Check out our Special Offer Hotel Deals!