|
Birds - Mammals - Marine Mammals - Misc - Fishing - Landscapes & Plants |
|
USA Sulphur caldron is one of the most acidic thermal features of the entire park. The pH is 1.3. The slope, once covered with green grass and trees, has become a barren landscape of fallen trees known as the 'cooking hillside'. Yellowstone NP. USA |
|
|
||
|
|
