Do bits of mountain under the sea count? And mountains on the equator being closer to the moon?
Can't be bothered giving it more than 30 seconds of thought though, so - shrug.
FKT
Allan Villiers and Eric Newby 'The last great grain race'. Can't remember Villiers' book title ATM and am away from my library. Could dig up some others too if I was home. 'Endless Sea' by a Norwegian I think.
I think there's the casual cruisers' definition of a circumnavigation which permits...