Dún Laoghaire on the south coast holds the Sunday People's Park Market with fifty stalls, the East and West Piers for coastal walks, and Teddy's 1950 ice.
Tip: DART to Dún Laoghaire, fifteen-minute walk south to People's Park. The Sunday market runs 10:00-16:00 year-round.
Malahide on the north coast holds a Saturday farmers market at the GAA pitch, Malahide Castle with its grounds and a coastal village with seafood pubs.
Tip: DART to Malahide, ten-minute walk to the village. Saturday farmers market 10:00-14:00; combine with Avoca cafe at Malahide Castle.
Kilkenny in Co Kilkenny is an hour and a half by train south of Dublin: the medieval castle, the Smithwick's Brewery Experience, the Hole in the Wall pub.
Tip: Train from Heuston Station; Smithwick's Experience runs 11:00-17:00 with the €20 tasting tour.
Glendalough and the Wicklow Mountains south of Dublin: Glendalough's monastic site, Wicklow Way walks, Powerscourt Estate, and Hunter's Hotel afternoon tea.
Tip: St Kevin's Bus runs Dublin to Glendalough daily; combine with lunch at Hunter's Hotel in Rathnew or the Wicklow Heather in Laragh.