Near the centre of the park is Mud Caldron, a circular crater about 40 ft.
Rictiovarus in disgust cast himself into the fire, or the caldron of boiling tar, from which they had emerged refreshed.
Similarly we may note the caldron or small steep depression of a round outline, and the furrow or long narrow groove in the continental shelf.
Certainly no other Polish king so thoroughly understood the nature of the ingredients of that witch's caldron, the Polish diet, as he did.
A depression of small extent when steep-sided is termed a " caldron," and a long narrow depression crossing a part of the continental border is termed a " furrow."