Faded Glory :(

The Morning Glory Pool is a hot spring located in the Upper Geyser Basin of Yellowstone National Park (Wyoming, USA). It was named after it's similar appearance to the morning glory flower. The color of the pool is due to bacteria which inhabit the water. 
On a few occasions the pool has actually erupted as a geyser following an earthquake or seismic activity in close proximity. Entryways have been clogged by tourists throwing objects into the pools which reduces the hot water supply, which in turns alters the pool's color and appearance.  It is not sometimes referred to as "Faded Glory"... not good!  The park has attempted to articially induce eruptions to clear blocked entryways with some results. The depth of the pool is 23 feet, the temperature 69.8 degrees and the elevation is 7,300 feet above sea level. Nice little strange spot :).