A pet project for many years now, this map highlights in green the railway lines which I have travelled on in the UK. The file for this image is huge, so below is only a thumbnail, you can click here for a PDF which is zoom-able. I'm doing my best to keep it up to date so keep an eye out for blog posts!
The below image and linked document are copyright to National Rail, the below is for my own personal non-commercial use (my website generates no revenue) only. My website is non-commercial and makes no profit. Obtained: http://www.nationalrail.co.uk/stations_destinations/maps.aspx