10 points on who can help me out with this question?

Question

I've always wondered.. say you were walking on the coast of some ocean, now imagine that there was no water in the ocean, you would be looking out at a 3-5 mile deep hole in the ground, of course it doesn't just drop straight off. but that would be kinda cool... if anyone would take the time to post some links that might show a picture of this, please do so.. I;ve looked and looked and cannot find any pics of that. But I am SURE there are some out there. So PLZ post some links related to this.

Answer 1

find it in mars !!!

Answer 2

http://www.genesisfiles.com/Images/DeadS...

http://images.google.com/imgres?imgurl=h...

Answer 3

It almost sounds like you're describing the Marianas Trench, a deep valley in the Pacific Ocean. Here's a link:

http://www.cnmi-guide.com/info/sketches/...

Answer 4

to me the Grand Canyon comes to mind