Grand Canyon
The great canyon of the American west that Speedy is reminded of by the hot springs of Subterranea.
First named in The Yellow Knight of Oz, ch. 8
Hot springs and small geysers bubbled up here and there between the rocks and reminded him not a little of the Yellowstone country and the Grand Canyon.
Where this is
placed In our world worked out
read out of the chapters cited on this page, not stated in any one sentence of them