Morning Glory Pool is located in Yellowstone National Park. The pool was named in the 1880s for its remarkable likeness to its namesake flower. The pool’s blue color is the result of heat-seeking bacteria.
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. As a result, other microorganisms have infiltrated the pool, changing its delicate ecosystem and coloring. Today, orange and yellow rings encroach on the blue waters.