I wandered around that church yard every lunchtime for 6 months before I realised the history of the place. Absolutely fascinating and not a tourist in sight!
That looks a lot like the Hardy Tree at St Pancras Old Church.
Actually the old church and St Pancras/ Camden wouldn't be a bad destination. You have a medieval church, moody grave yard and next door an old Victorian hospital where I used to work. Up from there you have the canal which can be...