Geoff Marshall shares his favourite bits of Tube trivia from the Northern Line.
Where can you find the Tube's highest and lowest points? Which station fibs about the number of stairs? What's the significance of the archer statue at East Finchley? And where can you spy a fake owl monitoring the platforms?
You might recognise Geoff from a recent BBC film documenting his attempts to regain the record for visiting all the Tube stations in one day.
Feel free to share your own favourite bits of Northern Line trivia in the comments below.
The Secret Bits of the Victoria Line
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