I am actually watching two falcons flitting about outside my office window right now. I am pretty sure they nest in the really tall building next door.
It must be an enthralling view. We have quite a few couples in London too (they pair-bond - or just never got caught?): on the chimney of Tate Modern, OXO Tower, Houses of Parliament, ...
"There were three pairs in London at the turn of the century; now there are 30, probably the second-highest density of peregrines anywhere in the world – after New York."
The Guardian, March 2017