Wednesday in Wyoming - June 19, 2019

If you study this picture, do you see what look like sponges? They're not sponges, of course, but are rocks formed by one of the many geysers in Yellowstone.

It's sights like this that make Yellowstone so popular with visitors from all around the world. We expect to see Old Faithful, but "sponges" aren't part of most guidebooks. That makes them all the more special.