On the second morning, we toured the Grand Canyon of the Yellowstone River, and its waterfalls.
Then Yellowstone Lake, where there are thermal pools,
and an area of “paint pots”, which were mostly dry due to the low water table from the drought. When they have water in them, they look like pools of paint for an artist's palette, each one a different color.
We saw lots of bison today.
More pictures here.