It would take approximately twice the volume of water we see today to cover the highest mountains. Where did it all go?
Well DUH! The Earth was flat during the flood *eye roll*
What a silly question.
Why, we drank it, of course.
If you really want an answer to that question (which I doubt), you’ll do some research and learn that there’s a great deal of H2O beneath the earth’s mantle — more than enough to cover the highest mountains (which probably weren’t mountains during the flood).
Part 1 or 6 each about 10 minutes long to explain Dr. Walt Brown PhD hydroplate theory [ see my homepage for more links].
Fountains of the Deep - the Flood of Noah; Earthquakes; 2 video series by Pastor Kevin Lea of Port Orchard Calvary Church in Port Orchard, OR [available on youtube videos] http://www.youtube.com/user/CalvaryChurchPO#p/c/11/XXQKSv5o_Po
BTW fishtank thanks for the post!
(1) the mountains were lifted up
(2) the water went underground