The clapper bridge at Drom An Ailigh, just south-west of Ballingeary in County Cork, spans what was once a meander of the River Lee, a looping bend that the river has long since abandoned and left to slowly silt up into marshy ground. A clapper bridge is one of the oldest and simplest crossings imaginable, flat stone slabs laid across low piers with no arch and no mortar, a form of construction that predates the Romans in Britain and Ireland. Here, eighteen such slabs stretch across a total distance of roughly twenty and a half metres, each slab approximately a metre and a quarter long, ninety centimetres wide, and seventy centimetres thick, resting on stone piers less than half a metre high.

What makes the layout quietly odd is the division of labour between the slabs. The southern nine cross the actual water channel, doing the job a bridge is meant to do. The northern nine, by contrast, now sit above silted, marshy land, spanning a ghost of the river rather than the river itself. The Lee has shifted, leaving the northern half of the bridge to hover above ground that was once a flowing channel and is now slowly becoming solid earth. The structure is approached from the road to the north by a set of concrete steps, and a footpath on the southern side, partly paved with stone slabs, leads onward to a second bridge over the main channel of the River Lee itself.

The bridge sits in a landscape that rewards slow movement rather than a quick look from a car window. The stone-paved start to the southern footpath suggests that this was once a well-used route, connecting Ballingeary to crossings over both the old meander and the main river beyond it. That combination, a relic crossing over abandoned water, followed by a working crossing over live water, gives the short walk an unexpectedly layered quality.