February 7, 2018 Mark F Travel, WY, US, National Parks Grand Prismatic Springs & Geysers, Yellowstone National Park February 7, 2018 Mark F Travel, WY, US, National Parks Yellowstone National Park is one of the most popular national parks in the U.S. There is so much to explore. This post will focus on some of the sights such as Old Faithful and Grand Prismatic Springs. A must visit.