The Dublin Area Rapid Transit system is linear. It runs along the coast line.
The stations are as follows, a 'B' following the name of a station means that one can take a bus onward to furthur even more mysterious places. The A beside Howth Junction indicates that you can get an onward bus straight to Dublin Airport, a very handy service and my best recommendation for getting from the Airport to the city.
North

              Howth
Malahide B  Sutton B
Portmarnock Bayside
    Howth Junction A
    Kilbarrack
    Raheny
    Harmonstown B
    Killester
    Clontarf Road
    Connolly Station B
    Tara Street B
    Pearse Station
    Lansdowne Road (Irish rugby team plays here !)
    Sandymount
    Sydney Parade B
    Booterstown
    Blackrock  B
    Seapoint          the sea ----} Wales and England
    Salthill
    Dun Laoghaire B (ferry to wales)
    Sandycove { me born here ... Joyce's Tower
    Glenageary
    Dalkey
    Killiney
    Shankill
    Bray
    Greystones

South