The information leaflet I was given when visiting Craggaunowen states that this is part of a genuine Iron Age wooden track (or Togher). It was excavated in 1985 at Corlea Bog in County Longford and then moved to its current location.
It is about 10 metres long and 2 metres wide. It consists of a series of wooden logs laid side by side. Only the tops of the logs are visible through the 'boggy type' soil. I imagine this is done to help preserve the wood as long as possible?
There is not a huge amount to see but how often do you get the chance to see an Iron Age track way?
Well worth a view when visiting the wonderful Craggaunowen Centre.