Ireland

Reasons to go:

The best place to stay:

Stoneybatter neighbourhood, with Phoenix Park for running and dear watching, and loads of exciting food places on and just off Manor street. Don’t miss Sorrento’s Takeaway - they make amazing sourdough bread and ice cream from scratch.

Museums:

Old Library in Trinity College Dublin (housing Book of Kells)
National Museum of Ireland - Archaeology. Contains loads of surprises (for example, a cat mummy and loads of gold), and is housed in an interesting building.
National Museum of Ireland - Decorative Arts & History. Learn about local geology and touch many rocks.

Coastal walks:

Howth - the coastal hike from Howth station is beautiful. Near Baily Lighthouse I’ve experienced the most windy conditions ever.
Coastal walk from Greystones to Bray. In Bray, Caffe Letterario GattaNera is a local gem.
From Sandycove & Glasthule station, explore the area around People’s Park and Dún Laoghaire neighbourhood.

Food and drink:

Powerhouse Bar in Roe & Co Distillery is where the best cocktails in town are. Book a table or just walk in, no need to consider a tour or any kind of “experience”. The view of St. Patrick’s Tower is a bonus.
PHX Bistro is excellent.
Still on my to-visit list: he Vintage Kitchen (modern Irish cuisine); Peruke & Periwig (cocktail bar); The Virgin Mary Bar (alcohol free).
Grocery shopping: I found Fresh supermarket and SuperValu have the stuff I like. Fallon & Byrne Food Hall is still on my to-visit list.

The nature is amazing.
Cahergall Stone Fort
The Valentia Island Tetrapod Footprints
Kerry Cliffs (Aillte Chiarraí)
Beehive Hut (Tóchar Maothaithe)
If you are passing through Dingle, stop for a great ice cream at Murphys Ice Cream.

Connemara Peated Single Malt Whiskey - is the only Irish whiskey that is as peaty as Scottish ones.