Every time I go to Yellowstone, I see something different. There are hundreds of great locations, each one of which should be visited for at least an hour during three different times of the day.
This is a new area I visited on my most recent trip there. I don't think it is always this steamy, since the air temp has to be a certain delta to the water. I don't know why, but it's always fun to sit there and watch the boiling water. I don't enjoy watching boiling water in my kitchen, but the sight there is always mesmerizing.. There is also the strong smell of sulfur carried through the area. It wasn't repulsive at all, but it did give me the just-took-off-my-helmet-on-an-away-mission feeling.
from the blog at www.stuckincustoms.com