Two millennia in the bog
The Corlea Trackway
In 148 or 147 BC, someone cut oak logs and built a road. Heavy planks, 3 to 3.5 metres long, laid across rails. Then it sank into the peat and vanished. The bog held it for two thousand years until archaeologists found it in the 1980s. It is the largest Iron Age roadway ever uncovered in Europe. What it was for — a ceremonial highway, a trade route, a ritual crossing between the Hill of Uisneach and Rathcroghan — remains an argument.
One section, preserved
The trackway at Corlea
An 18-metre stretch of the original trackway now sits in a climate-controlled hall at the Visitor Centre. You can walk alongside the oak planks. The Visitor Centre opens April to October. Guided walks across the bog take ninety minutes. The bog is not gentle — bring waterproof boots. The trackway itself is peat-dark and has the weight of things that took two millennia to return.
Preservation by burial
The peat
Peat is timeless and airless. The bog that drowned the trackway also kept it. Oak that would have rotted in a century stayed intact for twenty centuries. The same preservation that swallowed the road also saved it. Archaeologists found pottery, weapons, and arrowheads in the same bog — the Iron Age held underwater.