The kind of people who go walking
on the Scottish mountains may not be the same as those who commute around London, but a Tube-style map of the Highlands has been produced anyway.
Is the brainchild of geographer Peter Burgess, who previously produced a map of the Lake District called the Tubular Fells, with each coloured 'line' featuring the fells in each of Alfred Wainwright's seven pictorial guides.
Part of the proceeds (£1.50) from each £12.99 sale will go to the John Muir Trust and the umbrella body for Scottish Mountain Rescue.
He said: "After Tubular Fells I had my eyes set on the Himalayas or the Rocky Mountains for my next design, but people quickly started asking, 'are you going to produce one for the Scottish Munros?'"
Mr Burgess suggested it would be more like a national rail network map than a city transport diagram, but said he enjoyed producing the schematic map.
While it could never take the place of Ordnance Survey maps
, the MunrOverground does feature rail connections and other features like ferry services and long distance paths - though not the real underground railway in Glasgow - all of which caused its designer to admit it has helped him make more sense of the vast landscape.
And chairman of the John Muir Trust John Hutchison said: "The MunrOverground is hugely inspiring, I'm sure that anyone who loves Scotland's wild places would be glad to hang it on their wall."
Of course, there is a snag. While the official number of Munros stands at 283 following the de-listing of Sgurr ann Ceannaichean in 2009, the same surveying that saw that mountain changed to a Corbett has also uncovered the fact that Beinn a' Chleibh is also short of 3,000 ft. The new height is yet to be listed by Ordnance Survey and therefore the Scottish Mountaineering Council has delayed any confirmation of the mountain's new status.
When this happens, a Munro will have to drop off the list and the map be out of date.
But then again, the real tube sees new stations opened or closed every so often, so for Sgurr nan Ceannaichean or Beinn a' Chleibh read Brompton Road or Aldwych.