Emma,

I cross posted with you there.

Kingsbridge makes sense. It is not only the old name for the station, but also, as it suggests, a bridge over the Liffey, which I think is also officially named Sean Heuston Bridge. It would be a sensible route to take up towards the Phoenix Park from Christ Church - Down the South Quays past the Guinness (now Diageo) brewery at St James' Gate and across the bridge beside the station and up the appropriately named Parkgate Street and into the Phoenix Park. The "Furry Glen" in the park has long been a venue for courting couples.