You may be thinking of the polar plateau which is all ice and offers -- by some accounts -- the longest visible flat line to the horizon on Earth -- about eight miles.
Antarctica is the driest continent.
your head!
it is troll-a-lol
The Yucatan peninsula.
Australia is the only continent country (Antarctica is not a country), and it is the flattest continent as well. There are significant mountain ranges, but they are considerably lower than those of other continents.
Abyssal plains
Um it's not the mountains i can tell you that!
Flattest.
Landforms
flatter/flattest
Continental Slopes.
The flattest country in the world is Maldives.