Here's the water tower in Euston Street:
http://maps.google.co.uk/maps?q=Greenore,+Ireland&hl=en&ll=54.032679,-6.133289&spn=0.018551,0.038581&sll=53.800651,-4.064941&sspn=19.175733,39.506836&vpsrc=6&t=m&z=15&layer=c&cbll=54.03273,-6.133299&panoid=f93mGYDCcxwnj0NOUKjEwg&cbp=12,316.69,,0,2.23
Dundalk, Newry & Greenore Railway (LNWR). Terminus at Greenore.