Originally Posted by
Gertrude the Wombat
On a clear day from FL95 you can see the whole of East Anglia. No navigation is needed other than "oh look, there's Norwich, it's around 30 miles away, there's no military airspace at this height, just point at it and go". (OK, so the 172 does take a while to get up there, but you get a whole different view of the world.)
True, that also goes for the majority of the UK. Get up high enough on a clear day and you can always see a major landmark. I do a lot of flying around Suffolk and Norfolk and I still have some problems spotting airfields in amongst the patchwork of fields, even if I can see Norwich!