I found this on national geography website.
First reaction : Disbelief
Second reaction : Question mark
Third reaction : Inquisitiveness
Last reaction : Awestruck
It is actually a hot-water spring and the water is charged with silica which makes the water look like glowing ice. It’s located in a charred landscape, with remains of volcanic eruptions that were history.
source : Original Photograph @ National Geography taken by David Remacle.