Whilst that is true, I live about 25 miles from Ely and in that radius are a dozen such sites of historical interest (some more so than Witchford). Expand that out to the whole of East Anglia and Lincolnshire and you have an encyclopedia of places of aviation interest. So it doesn't make any particular sense that Ely was picked out. I think the algorithm could do with some attention. Most people get their bearings using the major population centres and when over the US for instance I find it frustrating to see 'Warsaw' picked out on the map, rather than say Cleveland or Columbus. I have no idea where Warsaw is (actually I do now, becuase I'm geeky and looked it up later), but the bigger cities would render the map far more useful in identifying your location.

Having said that, I think most of us on here would easily be able to locate the Charlie-Gibbs Fracture Zone on a map, I do hope it comes up as a pub quiz question soon.