But the sea isn't level
Our house is a shade over 600 metres above sea level. If you say that in feet it's just shy of 2,000 feet which, in the UK, would be hilly. The Yorkshire Three Peaks Challenge with Pen-y-Ghent at 694 metres, Whernside at 736 metres and Ingleborough at 723 metres are all a bit lower than the humble, but 800 metre high hill, Xirivell, at the back of our house. Just a little further away the Sierra del Carche range, which you can see from Pinoso and which you drive alongside on the way to nearby Jumilla, rises to 1371 metres which is just a few metres up on Ben Nevis at 1345 metres. That said the Grampians, the Lake District or the Machynlleth Hills call for high tech footwear, cuben fibre gear and trekking poles while Xirivell is much more a flip flops and shorts hill. The difference is the height of the surrounding flatland. The Spanish Ordnance Survey, the National Geographic Institute (IGN from it's initials in Spanish), began work on the first topographic maps in 1857. One of...