Towns & Cities which share/sprawl 2 counties

Have you noticed how parochial people get about their address when their from the secondary county which shares a big town or city.

Carlow/Graigecullen is my local example, houses bisected by the curious triangular encroachment across the river.
Athlone throws up Westmeath vs Roscommon, another triangle captured by WM here which crosses the Shannon.
Waterford falling into Kilkenny up by the Ferrybank.
For years I always thought Thomond & the Gaelic Grounds were in Clare until I realised Limerick crossed the Shannon.

I'm sure there's many more examples but they all throw up great inter town rivalry & great stories.