This is a fumarole at Bumpass Hell. According to the plaque that was posted, Bumpass Hell is one of the few places in the United States mainland that has active volcanic activity.
It stank, too! The whole area smells like steamy rotten eggs. There’s also the added attraction of boiling mud. It’s quite something to see. You can read more about Bumpass Hell here. There’s even a video.
Anyway – the reason for this photo? I had no idea such colors appeared in nature. I am very much taken with the muted grey / silver of the rock and the acid yellow of the sulphur crystals. It’s such a juxtaposition.
We had the necessities, like fresh coffee in the morning. I mean, a girl’s gotta start her morning right, doesn’t she?
Our traveling companions graciously hosted meals in their RV, which were both tasty and delightful. Their company was pretty darn nice too.