Ireland -- nah. Irish sheep are free range and have blotches of dye on them for ID purposes. Shepherds don't accompany them. Irish people don't wear hats like that, and anyone rounding up sheep would have a sheepdog. Plus avenues of trees like that would be incredibly unusual in Ireland.
Pembrokeshire Coast Path National Trail, Wales. Rated by Cheap Flights as one of the 10 best hiking trails in the world, this path twists 300 kilometers from St. Dogmaels to Amroth in southwest Wales. It's often wet and windy, but if you strike lucky on a sunny day this is one of the most beautiful places on earth. Scented gorse and crimson heather brighten the way.