Overview
The Aille is one of only two rivers in the Burren that flows on the surface all year – and even it gives up in a dry summer, sinking into the limestone caves near Doolin before it can reach the sea. It rises on the slopes of Slieve Elva, runs roughly 43km through the spa town of Lisdoonvarna and on through Doolin, and reaches the coast not far from the Cliffs of Moher. Two things along it are worth stopping for: the Twin Wells that made Lisdoonvarna a Victorian resort, and the Spectacle Bridge.
If you only have time for one, make it the bridge.
The Spectacle Bridge and the Twin Wells
Spectacle Bridge carries the N67 across a gorge up to 25 metres deep between Lisdoonvarna and Ennistymon. Rather than build one enormous arch, the county engineer – usually named as John Hill, working somewhere around the middle of the 19th century, though sources put the date anywhere from 1816 to 1875 – cut a single round hole through the masonry above the arch. In a flood, the river rises into that void and passes straight through instead of tearing the bridge apart. Seen head-on, the hole and its reflection look like a pair of spectacles, which is where the name comes from. It’s one of Clare’s most photographed pieces of engineering, and deservedly so.
Upstream in Lisdoonvarna, two springs rise from the same limestone bedrock: the Twin Wells, one sulphur, one iron and magnesium. Those minerals built the town – Victorian and Edwardian visitors came to ‘take the waters’, and Lisdoonvarna was Ireland’s last working spa. Manage your expectations, though: what survives now is a quiet riverside spot with the old stone troughs, not a grand pump room. It’s a ten-minute pause, not a morning.
The third crossing is the older Aille River Bridge near Doolin, a 15th-century flatbed structure – one of only a handful of flat-bed bridges left in Ireland.
What to see and do
- Spectacle Bridge: Pull into the small lay-by on the N67 and take the short footpath down to river level. The view from beneath the arch is best when the water is low and the stonework is fully exposed – but the ground underfoot is uneven and often damp, so watch your footing.
- The Twin Wells: A short walk south-east of Lisdoonvarna’s main street, free and open all hours, with a small public car park nearby.
- Walk on to the coast: From Doolin it’s about a 15-minute walk to the Cliffs of Moher coastal trail, and the 71-mile Burren Way passes through the village.
- Combine nearby: Doolin’s trad-music pubs are just north; the Cliffs of Moher and Aillwee Cave are both within a 15-minute drive.
Getting there and practical information
- By car: Spectacle Bridge sits directly on the N67 roughly halfway between Lisdoonvarna and Ennistymon; the lay-by is on the north side. The Twin Wells have their own small car park off the town centre.
- By public transport: Bus Éireann services run the Ennis–Lisdoonvarna–Doolin corridor along the N67, stopping within walking distance of the Lisdoonvarna sites.
- Entry: The river, bridges and wells are all outdoors, free and open year-round; winter daylight just shortens the day.
- Safety: The river looks gentle but levels rise fast after rain. Don’t swim, and keep back from the edge at the gorge.
Allow 45 minutes to an hour to see the Twin Wells and Spectacle Bridge together, wear shoes with grip for the descent, and go in early morning or late afternoon – softer light on the stone, and far less traffic to dodge on the N67.