As of today, in season now. Earth Exhibit tracks the live conditions and flags it the moment it is on.
Grand Prismatic Spring is the largest hot spring in the United States, located in Midway Geyser Basin, Yellowstone National Park.
Its deep-blue center and concentric rainbow rings are produced by temperature gradients and pigmented thermophilic microbial mats.
The spring is viewable year-round; visibility of the full rainbow is weather-dependent.
Where to see it
A taste of where to see it. The full map, exact coordinates and the best timing for each spot live in the app.
| Viewing spots |
|---|
| Midway Geyser Basin Parking Lot - boardwalk access |
| Fairy Falls Parking Lot / Grand Prismatic Overlook Trailhead |
| + 1 more spot, with exact coordinates and timing, in the app → |
This is the short version
This page shows a taste. The app has the full list of where to see this, the exact timing, and live conditions for 1,000+ natural phenomena worldwide, so you know the moment one is genuinely worth the trip.