Early next morning, we set off for our tour of the Yellowstone Park. Our guide John said that the park covers an area of more than 8000 sq. kms and it can be broadly divided into three areas: the geothermal area comprising volcanoes and hot springs; canyons and rivers, lakes and forests and we could have a glimpse of all three.
At the visitor's centre, we were told that the next eruption was at 11.20 am and we rushed towards the geyser and sat on the benches placed nearby. Exactly at 11.17 am, a gushing noise came from the earth followed by steam. A trickle of water came but soon like a fountain, the geyser erupted high. We were told that the average height is about 150 ft. When it stopped, we proceeded towards the Grand Prismatic Spring, the largest hot spring in America and the third largest in the world.