Overview
Poolbeg is an artificial peninsula reaching out from Ringsend into Dublin Bay, and its point is a place in the city where you can stand with open water on both sides. At the end of it, at the tip of the Great South Wall, stands the cherry-red Poolbeg Lighthouse, which marks the shipping channel. The walk out is a straight, wind-scoured granite causeway that swaps traffic for breaking waves, passing container ships close enough to read their names. The wall is a public walk when it is open, and the lighthouse is a working one, so view it from outside.
History and industrial heritage
The wall came before the land. Work began around 1715 with a line of timber piles driven across the South Bull sandbank to hold back the silt that was choking the Liffey’s mouth; the stone wall that replaced them was finished in 1795. The granite was quarried nearby and laid by hand.
The lighthouse went up in 1767 and first shone in 1768, burning candles before switching to oil in 1786. The rebuild of 1820 gave it the shape and, later, the red paint you see now, red marking the port side for ships coming in. It is still an active light, automated and run by Dublin Port Company, and the tower itself is closed to the public.
The land behind grew into Dublin’s power district. The old Pigeon House station gave way to the Poolbeg Power Station, whose two red-and-white chimneys stand more than 200 metres high. The plant wound down in 2010 and the chimneys were slated for demolition, but a public campaign saved them; they were listed as protected structures in 2014 and have become the unofficial marker of the south city skyline. They are visible from the waterfront and from the wall.
The Great South Wall walk
Dublin Port reopened the roundhead in March 2026 after repairs following storm damage. Check current access and respect any signs or barriers.
Use designated parking and follow public paths around the working port. The distance varies with your starting point, whether you begin near the Pigeon House Road end or walk in from the Sandymount Strand side. For a shorter shore outing, choose the paths at Irishtown Nature Park.
The old granite slabs are uneven and go greasy when wet, there is no continuous railing on the exposed parts, and the wind rarely lets up. Avoid the wall in strong wind, rough seas or poor visibility, and turn back if waves are reaching the path. Check the tide as well, since the sea can wash over parts of the outer wall at high water. This is not a walk for wheelchairs or buggies past the point where the smooth path ends, and it isn’t one to do after dark. Wear sturdy, flat shoes with grip, and take the wet stone seriously.
What to see and do
- Poolbeg Lighthouse – the red tower against grey sea and sky is the shot everyone comes for; softest light is sunrise, most dramatic is sunset behind the city.
- Poolbeg Chimneys – best framed from halfway along the wall or from the shore at Irishtown Nature Park.
- Wildlife – cormorants, herons, gulls and terns work the bay, and grey seals and porpoises are sometimes seen near the lighthouse and in the channel.
- Shellybanks Beach – a small sandy cove near the start of the walk, good for sitting out of the wind.
Practical information
Getting there
- By car: use designated parking and follow port and road signs. Spaces near the wall are limited, so allow for a walk in.
- Public transport: the DART to Sandymount or a bus to Ringsend both put you within walking distance. Check current routes before you travel.
- By bike: the granite paving isn’t rideable, so most people lock up and walk the last stretch.
Facilities and safety
- Don’t count on toilets, bins or shops on the wall itself.
- Check current access before you set out, and keep this for a daytime, dry-weather walk.
- Keep dogs on a lead and under close control near the water.
Nearby
- Irishtown Nature Park – a woodland and pond reserve just inland, with good birdwatching.
- Sandymount Strand – the wide, shallow beach beside the longer approach to the wall.
- Ringsend village – old harbour pubs a few minutes inland, the obvious place to thaw out after the wind.
If you only do one thing, time the walk for the half-hour before sunset, once you have checked that the wall is open: the light goes pink over the bay, the chimneys catch it, and the red lighthouse lines up against the city on the way back.