This fine shot of the bridge and stronghold at Athy is from the Eason Collection. I have deliberately included the title as shown because it raises questions and of course Athy is NOT in Co, Kerry!
The staff at NLI include all information on a file as provided to them regardless of how inaccurate it may seem. When research clarifies the matter and they can include the correct information then they update the file and correct the error!
As today's commenters note, we've visited the delightfully named Cromaboo Bridge
and White's Castle
each previously. beachcomberaustralia
suggests that (based on the ivy growth on the castle, and possibly coroberated by the fashions visible on the megazoom[tm]) today's image may predate the previously shared image of White's Castle - which was proposed to date to the 1920s or later....
Collection: Eason Photographic Collection
Date: c.1900-1939 (though possibly <1920s per comments)
NLI Ref: EAS_2402
You can also view this image, and many thousands of others, on the NLI’s catalogue at catalogue.nli.ie
Owner: National Library of Ireland on The Commons
Source: Flickr Commons