What a good question.
there is a distinct point on my ride home where I feel I've arrived, I turn off into my neighbourhood, I relax, I stop pedalling, sit up tall and breathe in the air as I try to coast the last 200 yards to my doorstep (through a very quiet cul-de-sac type road) without pedalling as its slightly down hill. as soon as I turn off from the road I feel like I'm home.
On the way in its much later, I only really feel like I'm here when I get the bike to a stop outside the front door of the office.