the Underwritten States of America that caught my eye, but there are lots of other intriguing links in the 'Recent posts' section. I particularly like the Alphabet Maps of Great Britain and Ireland
You can also search the blog archive of more that 500 posts, or browse back, post by post. There are a number of comments attached to each post, and these can make interesting reading too. For example, one on the Underwritten States of America page suggests that it is for the purposes of life insurance, rather than health insurance, which I am inclined to agree with.