I don't know whether this is the right place to do this, in fact I'm pretty sure it isn't, but I'll give it a shot anyway, there might be interesting results.
The girlfriend (Portuguese) and a few female friends (France and Portugal) are planning to visit Belfast this week and want to know what to do. They're planning to arrive at Belfast Central and pretty much go on foot from there. I'll hold my hand up, I've been to Belfast a few times, but only for a short time and have no idea what do advise. St. Anne's Cathedral was good from what I remember, and Queen's is situated in a nice area, but that's about it.
I know the murals/black taxi gigs but they're not much interested in that; traditional Irish stuff is of interest, but I've no idea how much, or little, of that Belfast offers.
What would native Belfastians advise? Titanic quarter? Cathedral? Anything else? I'm open to all comers.