Third Forest. Photo by Jerry McLain. Colorful petrified log sections, typical of many found in the monument. Photo by Esther Henderson. Blue Forest Badlands—Colorful banded ridges, a three mile side trip. Photo by Ray Manly. Agate Bridge. Erosion has cut out the rock from under this log leaving a span of 45 feet forming a bridge, now supported by a beam. Photo by Leon Cantrell. An example of color and erosion in the First Forest. Photo by Josef Muench. Logs of rainbow hues in the Second Forest.