The Goal: To travel England by reading, and read at least one book per however many counties of England you decide to read.
Example: You aim to read three books set in three different counties, and you read Far From the Madding Crowd by Thomas Hardy, Mrs. Dalloway by Virginia Woolf, and The Darling Buds of May by H. E. Bates. Reading these means you have read a book from Dorset (Far From the Madding Crowd), London (Mrs Dalloway), and Kent (The Darling Buds of May).
This requires that when I read a book set in England, I figure out what county it is set in. Oh dear. And, as o says, counting English counties isn't as simple as you'd think. Not to mention the fictional counties; Hardy's fictional Wessex would count as the closest real-life place, and what about Barsetshire? It's a bit tricky, but I think this will be quite fun.
I don't yet know what books I will read, except that I will certainly want to read The Last Chronicle of Barsetshire. I will probably use this to knock off a bunch of the English titles on my CC list that I've been putting off in favor of Russians and Africans. (If I read the Venerable Bede, that will take care of Northumberland, right?)
Note that this project only covers England. You could probably have other challenges dedicated to Scotland, Wales, and all sorts of other pieces of the UK/Ireland, and I would be happy to join those too! One year at a time, though.