Geysir

It's pronounced GAY-zeer, according to the tour guides. We drove past them on our way to Gullfoss, and then turned around and went back to them.

First, pictures from the drive past:

And now, from the visit itself:

I got a video of Geysir going off, and I'm seriously considering adding this video to the Quest for Rinaria: Through Gray Water when the ferret pirates Eneng and Winterblade come across a geyser themselves: