There is an identical building to this on Whitehall Road in Churchtown in Dublin. It was know as 'the Bottle Tower'. I used to cycle past it every day as it was near my school.

There was a smaller version beside it, about half the height.

I did a quick search and found the following on the dlrcoco.ie site -

BOTTLE TOWER, CHURCHTOWN - A folly erected during the bad winter of 1741/42 as relief work for the poor. The Tower and its smaller colleague are similar in design to the "Wonderful Barn" near Leixlip, built in 1743 by the Connolly's of Castletown.

So now you know where the other one is!