Sulphur Caldron
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.
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