Missed the allusions

1. Dublin in the rare old times
2. Boys of Wexford
3.
4. Tramore
5. Skibbereen
6. Bantry bay (SotCD)
7. Dingle
8. Rose of Tralee
9. Cliffs of Doneen
10.
11. Kilrush -Cliffs of Doneen
12. Kilkee - Cliffs of Doneen
13. Galway (SotCD)
14.
15. Mary of Dungloe
16. Derry Quay (SotCD)
17. I wish I was in Carrickfergus
18.
19. Bannbridge town in the county down
20. Dublin (SotCD)