Ground Prismatic Spring, Yellowstone National Park (click to enlarge)

Here is a boardwalk level view of Grand Prismatic Spring at Yellowstone National Park.  Colorful, but not overly impressive.  The impressive image would be taken from that ridgeline in the background.

To get to that location, one would park at the Fairy Falls trailhead and hike to the desired location.  Unfortunately for us, the Fairy Falls trail was closed for maintenance for the duration of our stay.  From what we could see, it looked like the park is building a new observation platform on the ridge overlooking Grand Prismatic Spring.

Oh well, getting an image from that platform is a good excuse to return to Yellowstone.

Grand Prismatic Spring N44 31 31.94 W110 50 15.51