Went a couple of weeks ago for three nights. We booked a day tour which covered a crater, the geysers, secret lagoon and the parliamentary place. Blue lagoon had just reopened, but we booked before when it was still closed. tour included the northern lights, but they weren’t active so didn’t see them.
Did whale watching and there was a few in the harbour, so still may be there.
The city is quaint, £10 a pint is average, half price happy hour in the Irish bars.
enjoy.