Grand Prismatic Spring and the Midway Geyser Basin a few miles north of Old Faithful, looking NNE. See an overhead shot of the Grand Prismatic Spring in the Preliminaries gallery.

It was here on August 4, barely a month earlier, that Jim Wright was killed and his incomparable Hughes H-1 Racer replica was destroyed as he attempted a forced landing after losing engine power. Witnesses on the boardwalk between the hot pools reported that he maneuvered to avoid them in the last seconds before the crash. See http://www.wrightools.com/hughes/