A short drive from Old Faithful, in Yellowstone National Park, one can find the parking lot for the Grand Prismatic Pool. This geothermal feature is a giant cauldron of hot waters, minerals, and rare microscopic organisms which create these amazing colors. It's definitely worth stopping and taking the short boardwalk to see the pool up close, but another great option is to take the Fairy Falls hiking trail which passes along the South end of the Pool. A half hour hike down the trail puts you just south of the pool. Here you’ll see a side trail heading up the hill to your left. A scramble up this short, but steep, side trail leads to this amazing view of the Grand Prismatic from above. It's a bit of a climb, but this rewarding view is definitely worth it. Once back on the trail continue on to Fairy Falls which is a great place to stop for lunch before turning around.