The thermal features of Yellowstone, in addition to all their science coolness, have a beauty that always surprises me. Check out the little gallery after the jump.

For those who'd like to know:

1. Blue Star Spring (Upper Geyser Basin)
2. Geyserite on Spasmodic Geyser (Upper Geyser Basin)
3. Morning Glory Pool (Upper Geyser Basin)
4. Bacteria in Silex Spring Runoff (Lower Geyser Basin)
5. Geyserite near Minuteman Geyser (Shoshone Geyser basin)
6. Travertine in Cupid Spring (Mammoth Hot Springs)