We saw a lot of interesting things today. Although we saw Old Faithful, it was from a long distance. There was about 11/2 hrs to wait for it to blow when we got there, so we decided to take a walk on the boardwalk. The colour in some of the pools is caused by the microorganism living in them. That colour of the pools can change because the temperature of the water changes, depending on the season. As far as wildlife goes, we saw some kind of blue bird, bison, deer, and a black caterpillar wriggling along on the sidewalk. Capped off the day with a delicious dinner at an authentic Spanish restaurant.