| | Runoff from the Excelsior pool |
| | Excelsior Pool |
| | Postcard of aerial view of Grand Prismatic Pool, a hot springs that is 380 feet in diameter. |
| | Steam from the Grand Prismatic Pool. Note that the steam is aqua colored! |
| | On the other end, the steam is rust colored. |
| | The bacterial mat adds even more color. |
| | Mini-Me for the grand prismatic pool |