Howth has been a filming location for movies such as The Last of the High Kings, Boy Eats Girl and Sing Street. Wikipedia
Howth in Ireland offers a unique experience to travellers. Howth is located at a short trip away from Dublin a major city in Ireland. Add Dublin to your vacation plan, it has an interesting bunch of activities to do on your visit like National Library Of Ireland, Bram Stokers Castle Dracula, Irish Dance Party. Also, to reach Howth, you'll have to take a flight to Dublin; so its not really a detour. And even if it is, the city is worth paying at least a quick visit. Most online packages to this city are of 1-2 days.
Don't just take a trip, let the trip take you! Have a enjoyable time at Howth.