In Xanadu did Kubla Khan
A stately pleasure-dome decree :
Where Alph, the sacred river, ran…
Google Map of Xanadu, Inner Mongolia, China.
…Five miles meandering with a mazy motion
Through wood and dale the sacred river ran,
Then reached the caverns measureless to man,
And sank in tumult to a lifeless ocean…
Google Map of Santa Fe River, Alachua County, Florida.
… in front, just under my feet, was the enchanting and amazing crystal fountain which incessantly threw up from dark rocky caverns below, tons of water every minute, forming a basin, capacious enough for large shallops to ride in, and a creek of four or five feet depth of water and near twenty yards over, which meanders six miles through green meadows, pouring its limpid waters into the great Lake George.
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Google Map of Salt Springs, Florida.
… directly opposite to the mouth or outlet of the creek, is a continual and amazing ebullition where the waters are thrown up in such abundance and amazing force, as to jet and swell up two or three feet above the common surface: white sand and small particles of shells are thrown up with the waters near to the top, … The ebullition is astonishing and continual, though its greatest force of fury intermits, regularly, for the space of thiry seconds of time: …
William Bartram (1739-1823) record of his travels to America, Travels, published 1792.