The Sulphur Caldron area can be viewed from a staging area just north of Mud Volcano. The Sulphur Caldron is among the most acidic springs in the park with a pH of 1.3. Its yellow, turbulent splashing waters bring to mind images of Shakespeare's soothsayers. Other features which can be viewed from this overlook are Turbulent Pool (which is no longer "turbulent") and the crater of a large, active mudpot.
For more specific information on the features of the Mud Volcano/Sulphur Caldron area, consult the annual reports that are available in the Ranger Naturalist Office adjacent to the Fishing Bridge Visitor Center.