Where two counties touch
The boundary
The River Suck is the official line. Galway is on the south and west bank. Roscommon is on the north and east. Ballymoe straddles it. The locals have a joke about needing two county councils to fix a pothole. The joke isn't funny anymore because it's true.
The crossing point
The bridge
The main bridge is the only place where you cross from one county to the other on foot. It's a simple stone bridge, old enough that no one remembers when it was built. It's wide enough for two cars if they trust each other. Most do.
Always passing through
The road traffic
Ballymoe exists because the roads meet here. Dublin to Athlone traffic passes through. Local farmers use the main street as a shortcut. The petrol station gets custom from both counties. The pub sees faces from both sides of the Suck.