Geoff puts it to the test.
Look out for the abandoned platform.
We completed the challenge, so you don't have to.
We visit the tips of the icebergs.
More treasures hiding in plain sight.
One's now a bookshop.
Know-know-know.
0 = empty carriage.
We had a race.
Great Fire factoid.
It closes in 2017.
We've been exploring again.
Metro masterpieces.
Why is it there and what does it mean?
Hidden away in the walls and steps.
Plus, a visit to an abandoned railway station.
Not just the one set.
Make sure you check them out next time.
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