"Long a favored destination for park visitors, Morning Glory Pool was named in the 1880s for its
remarkable likeness to its namesake flower. However, this beautiful pool has fallen victim to
vandalism. People have thrown literally tons of coins, trash, rocks, and logs into the pool. Much of
the debris subsequently became embedded in the sides and vent of the spring, affecting water
circulation and accelerating the loss of thermal energy. Through the years Morning Glory's appearance
has changed as its temperature dropped. Orange and yellow bacteria that formerly colored only the
periphery of the spring now spread toward its center." - National Park Service, US Department of the Interior