I suspect that there aren't a lot because:
a) it was traditionally a somewhat poor country (compared to England)
b) ****, it rains a LOT all year around.
Of course, this means that what top-down classics there are were likely inside most of the time.
They like to mention the glory days of the DeLorean, but in Belfast anyway, the big thing is the new multi-million-Euro "Titanic Zone" where they are really milking the Titanic craze. I was amazed how SMALL the Titanic was compared to modern cruise-ships. One funny thing, they have some T-shirt with the ship on it (and "Belfast") stating: "It was fine when it left here!" or "Built by an Irishman and sunk by an Englishman." :highly_amused:
Belfast still have evidence of "The Troubles" (that started in The Bog district of Derry) and because we were there on July 5th, the bonfires were still being built for the July 12th "celebration" - which still creates a lot of tension. BTW, those bonfire piles are HUGE - something like 75' wide at the base and maybe 50' tall and sometimes filled with HUNDREDS of tires). There's a joke that some commercial pilots would say "ladies and gentlemen, we are about to land in Belfast, where the local time is 1690." Of course, referring to the Battle of Boyne where William of Orange beat James the 2nd... and that is recognized every year on the 12th as if they just can't get over it. Derry has a bit of this tension too around the 12th. There are marches of the Orangemen that try to go into Protestant neighborhoods but the police keep them out. Despite what some think, it's really less about the Catholics vs. Protestants, and more the Loyalists vs. the Unionists (though that does tend to also split down religious lines). I saw some signs where "London" was crossed out on Londonderry... and which name you use reveals whether you'd rather be in the UK or the Republic. Interesting history... 1690, 1916, 1921-24 (civil war), early 70s... right up to the US-brokered peace of 1994 (and is still holding).