Blackpool was, not long ago really black. Low water temperature caused by certain microorganisms the dark color of the water. In the summer of 1991 the water became much warmer and it came to several eruptions. Since then the Blackpool is one of the most beautiful Pools. Also due to its location, close to the Yellowstone Lake.
|Photo Location:||Wyoming, United States of America|
|Copyright:||© Peer Heesterbeek|