Today’s public domain images are of the British Isles: Ireland and the United Kingdom.
The CIA World Factbook doesn’t list Wales, England, Scotland, and Northern Ireland separately; they are all included under United Kingdom. But I have broken them out here. However, you won’t find a section for Northen Ireland since there were no photos in the Factbook to choose from.
Scotland
Eilean Donan Castle (1220), Loch Duichear, Kyle of Lochalsh, Scotland.