Ross Castle, Killarney, Ireland, c. 1895. This castle, now restored, was then in a state of disrepair, as can be seen by the extensive covering of ivy over it.
This is a photochrom, basically, a type of recoloured photograph suitable for mass-printing using Victorian technology. Unlike half-toning, the number of colours used is much higher, I seem to recall hearing 14 as fairly standard.
The Detroit Photographic Company, who created this, rather specialised in them, and you'll probably see many of them. They're not that hard of a restoration, though this still took me three hours or so.
The scan [link]
from the Library of Congress wasn't perfect, but it wasn't too
bad. Photochroms are naturally fairly grainy, so...
In any case, a gorgeous view of a ruin which has since been restored.