2. Grand Prismatic Spring, Yellowstone National Park, Wyoming
The grand prismatic spring is a stunningly colorful hot spring located in the Yellowstone National Park in Wyoming. At a depth of 121 feet and a diameter of 370 feet, the grand prismatic spring is the largest hot spring in the United States. The brilliant coloration is one of the most distinguishing factors of grand prismatic hot spring. The mineral rich, deep-blue colored water of this hot spring is lined with patches of vibrant red, yellow and green.
The magnificent coloration on the edges of grand prismatic hot spring is caused by the presence of pigmented bacteria. They can thrive in the high temperature of the hot springs. But no form of life present in the center pool due to extreme heat which can reach temperature around 87 degree Celsius.