The Upper Geyser Basin is home to the largest concentration of geysers in the world, including the famous Old Faithful geyser. It covers an area of approximately 2 square miles and has over 500 geysers, hot springs, fumaroles, and mud pots. You can explore the basin through a network of boardwalks that provide easy access to the various geysers and other hydrothermal features. The basin is also home to a visitor center, which provides information about the geysers and the geological processes that create them. We recommend visiting this basin later in the afternoon to avoid crowds and catch perfect lighting that amplifies all the features of this geothermal field. Start your trip from the main Old Faithful parking lot and slowly make your way up to the last (and our favorite) Morning Glory Pool โ a stunningly beautiful hot spring. Another tip is to continue on foot for another 15 minutes beyond the Morning Glory Pool and reach the Biscuit Basin, cutting extra driving and parking time. The Upper Geyser Basin is a fascinating natural wonder and a must-see attraction.