If you'd like to examine the geographical route of the London Underground without leaving your armchair, then you can do just that using Google Earth (which you can download for free). I've put together a file containing details of Tube lines that you can load into Google Earth. All you need to do is:
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Download Google Earth for free and install it on your computer
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Download my route file (36K) and double-click on it to load it into Google Earth
And hey presto! Google Earth loads up my route, ready for you to explore. Enjoy!
