The smell of sulphur.
Many people know that Iceland is a volcanic island: the rocks and the beaches are grey-black, there are many geysirs and hot water pools. However, that is only part of the story. Think about other places where you would find black stone and perhaps a small stream of lava here and there. Pretty hot place, said to be somewhat on the uncomfortable side. Dude with horns is bossing people around. Got me? So, what would you expect of the smell in this place? Kinda sulphurous, right? Correct. But what does that mean: kinda sulphurous
? Well, a bit like rotten eggs. The funny thing is that here, you inevitably encounter this smell in the place where the smellscape is supposed to be on the opposite side of rotten: the bathroom and the shower. Ugh? Yup. I guess this is because the hot water here is not ground water that is being heated in the house, but instead comes out of the ground being pretty hot already. Heated by your energy-providing friend, the vulcano. Thus the sulphurous smell. Enjoy the island!