Here's some photos of the different fumarole caves we explored. These caves are made by warm steam flowing up out of the rocks, which melts the snow on top and over time creates these tunnels and big rooms. It's kind of risky business being on the surface, though, because you never know what's beneath you. Any time we stepped off rocks we would probe with our glacier axes and be pretty cautious.

The snow and ice formations on the surface are pretty wild and once inside the caves it is pretty incredible blue light. Some of the fumarole towers are pretty massive, like the one that looks like it's about to eat Deb. The last set of caves we found were over some exceptionally warm ground where the snow was melted away and the moist soil even had algae growing on it! The temperature inside felt like a humid 70 or 80 degrees. Pretty amazing stuff!

~G