Grand Prismatic Spring is the largest hot spring in the United States and the third largest in the world. In 1871, it was discovered by geologists and named the Grand Prism for its striking color.

The Grand Prismatic Hot Spring is an outstanding representative of Yellowstone Hot Springs, with a diameter of more than 100 meters, showing blue, green, yellow, orange, red and other colors from the center. It is the largest and most beautiful landscape.

Grand Prismatic Spring is located in Yellowstone National Park, Wyoming, USA. It is about 75 to 91 meters wide and 49 meters deep, and at a temperature of about 71C, about 2,000 liters of groundwater are gushing out per minute.

What is the best way to appreciate the Grand Prism?

The best way to appreciate the Grand Prism is to look at it from above. Her fullest face can only be seen from the top down, and regular close-up viewing tends to suffer from the heat gushing from the spring.

You can drive to the Fairy Falls Trail and then walk uphill for a short walk to get a panoramic view.

The changing colors of the four seasons.

The beauty of Grand Prismatic Spring is that the color of the lake changes with the seasons, from green to a brilliant orange-red in spring.

The ratio of chlorophyll and carotenoids changes with the seasons, so the hot spring water takes on different colors.

In summer, the chlorophyll content is low and it is orange, red or yellow.

But in winter, due to the lack of light, these microbes produce more chlorophyll to suppress the color of the carotenoids, resulting in dark green water.

Bacteria of different colors live here, and the color of the entire spring lake also changes in concentric circles, but the center of the hot spring is dark blue due to high temperature, and bacteria cannot survive.

If bacteria get into the skin, they can be as deadly as chemical weapons.

It can be said that both the beauty of the Grand Prism and the danger of the Grand Prism stem from the existence of bacteria and viruses, which makes it extremely mysterious.

The best time to come here is from June to September every year, try to avoid cloudy days and high moisture.

There is a walking boardwalk around the Grand Prism. You can take pictures here when the sun goes down.

Be sure to pay attention! It is hot in summer and cold in winter, with an altitude of more than 2,000 meters and a large temperature difference. Pay attention to sun protection during the day and keep warm at night.