Sunday, a day of rest. Do you really want to toiling round a hot shopping centre when you could be Roaming by the River or doing the London Wall Walk with me?
The river is the Thames, the reason why London exists. This walk is subtitled Fish and Ships which probably explains all you need to know.
The Romans built the first wall, more as a status symbol than for defensive purposes, and we cross the City from East to West within its boundaries.
It’s not a hard choice now is it?