I have a reply to an email from Dr Graema Davis ( see http://graemedavis.blogspot.com/A%20Brit%20in%20Ic eland.doc)
who says "The Blue Lagoon (Blaa Lonid) in Iceland (Grindavik) is a swimming pool
where the hot water is a by-product of the geothermal power station. And
yes, you have to pay to swim - in the region of �10 per adult."
E is Vasco de Gama - look at the image of the bust on the Corbis website - pretty close I think.
Still cannot find 25b but I feel sure it is not Christopher Columbus or at least it does not look like any picture I have seen of him. 25b looks more 19th century.
Max