Some famious people in music and entertainment that come from Ireland:
Music
Film/Tv
Bono - most of the world know about Bono
The most famous mountains in Ireland is the mountains of Mourne. These mountains are in northern Ireland. The Mourne Mountains are the most visited.
The JKennedys from Ireland are their most famous clan
Although Dublin is the busiest and largest airport in Ireland, I believe Shannon airport is the most famous.
Yes.
Peat
shamrock
He is most famous for converting Ireland to Christianity.
Irish Stew is probably the meal most associated with Ireland. Potatoes are strongly associated with Ireland.
No he wouldn't be. St. Patrick actually wasn't even from Ireland. He is credited with having brought Christianity to Ireland and he came from elsewhere, most likely Britain.
Yes. The most famous was William Rowan Hamilton.
The Giant's Causeway would be the most famous.