As they approached the waterfall, Mary saw a beautiful rainbow stretching across the sky. She had never seen anything so beautiful before. Ranger Tom explained that the rainbow was caused by the sunlight passing through the water droplets in the air. Mary's brother was fascinated by the way the light reflected off the water. Mary's mom took a picture of the family in front of the waterfall, with Ranger Tom standing next to them. As they stood there, Mary felt grateful for the experience and the time she was spending with her family.