How exciting to hear about your upcoming trip!
Starting from Knock you have a great selection of options, here are a few I would suggest:
If you are heading towards Donegal, you may enjoy exploring the North-West of Ireland
. This route allows you to explore cities and coastal roads alike, heading towards Northern Ireland.
Moving closer to Mayo, I can suggest visiting Achill Island, the largest of the Irish isles.
You can find many historic sites in county Mayo such as Céide Fields
, a 6000 year old dwelling with accompanying tombs.
From Donegal you are also on the doorstep of the Wild Atlantic Way
. The Wild Atlantic Way remains Ireland's most popular touring route, covering over 2500 km along the west coast.
I hope these tips inspire you!
Please let me know if these bring up specific places or attractions you would like to visit.
I'm happy to help with any other questions, you may have.