200 metres down from Portmarnock train station is this suburban curiosity. What is it? Why was it put here? Will it last for much longer? The last can be answered with some confidence – at least into the near future with the over-the-top fencing that has been erected to, one presumes, protect it. The field it's in is one of those places that looks like its ready to start the second the property collapse bottoms out. This one's for the completists only.