Waterfalls - I love 'em. Yellowstone, however, is not known for its waterfalls in particular. One, the Lower Falls on the Yellowstone River, is iconic but most of the others are little known. They drew me.
Located on a side road south of the Madison area, a rugged canyon frames this waterfall.
North of Madison along the loop road, a parking area and a short walk yield a wonderful view.
Just off the Grand Loop Road between Mammoth and Tower, Undine Falls sparkled in the midday sun. It would have been fun to see it in mid- to late afternoon, with the sun full on the falls.
This waterfall is at the Tower area, and can be seen with a short walk. The trail to the base is washed out, making a shot from that angle not obtainable.
A half mile hike is needed to get to a viewpoint of this waterfall. It is not the grandest, but I really liked it.