27Jun 2011 PIC_1427 by Shumaila Chauhan ⋅ Leave a Comment Post Navigation ← Return to PIC_1427 The Mud Volcano in Yellowstone National Park is in an area of mud pots with dozens of geothermal features to enjoy. Right away you’ll smell the “rotten egg” odor and know you are close to the center of the crater that forms the park.