The Corlea Trackway Visitor Centre interprets the significance of an Iron Age bog road dated to the year 148 BC which crosses the boglands close to the River Shannon. In 1984 a major pre historic trackway of large oak planks was discovered in the raised bog at Corlea near the village of Kenagh in County Longford. Most of this track was in a Bord na Mona owned bog and was in an advanced stage of decay. Samples from the track were dated at Queens University in Belfast and this highlighted the importance of the track as the only example from Ireland dateable to the early Iron Age. In 1985 excavation work began which discovered four other trackways in the same bog. These were also investigated as well an additional sixteen tracks which were later found together along the western edge of the bog where they had been exposed by the activities of peat milling machines. The survival of these tracks through thousands of years greatly broadens our knowledge of early civilisations in Ireland. According to the experts who excavated Corlea Trackway it would have been built to allow the passage of wheeled vehicles. It was however not long in use before it actually sank into the peat where it then remained preserved until its discovery in 1984. Although similar trackways have been found in Germany, the Netherlands and Britain none compare to the great Iron Age trackway at Corlea which is bigger and heavier than any other prehistoric road in Europe.