This place is like nowhere else, near the camping at Kerlingarfjöll, which you can reach with a 4WD car, and even get closer driving though walking the long trail to this site is more breathtaking.
The "red" path goes right in the middle of the fumes and hot springs, that usually are fobidden to go too close; better have a solid pair of shoes, and not be afraid of steep and muddy slopes! But this makes an incredible experience to live.
In this panorama, most of the hot spring and fumes are hidden though: as usual in Iceland it is very hard to find the "best" place to look at! In the background you can also see the nearby glacier.