Where does all those water from Niagara Falls comes from?

Question

Its unimaginable the continuous flowing of large volumes of water down the fall ...

Answer 1

niagara river

Answer 2

The tears I might have shed for your dark fate...

Sorry, I thought it was a perfect time for a movie quote!

Answer 3

The Great Lakes eventually empty into Lake Erie and Lake Erie flows into the Niagara River, over Niagara Falls and into Lake Ontario.  Lake Ontario flows east and into the St. Lawrence River which flows to the Atlantic Ocean.

Answer 4

its from the great lakes that comes from northern canada