Big Four Waterfall (by Lulumière)
“There is the birth of the Running River,” said Thorin. “From here it hastens to the Gate. Let us follow it!”
Out of a dark opening in a wall of rock there issued a boiling water, and it flowed swirling in a narrow channel, carved and made straight and deep by the cunning of ancient hands.
– The Hobbit, Chapter XIII Not At Home