EDIT: Ooops Manhatten was already posted... well then what about the Southpole?
LOL, that was good. I entered the coordinates for the South Pole and made the jump, and found myself here:
Turns out there's a big hole at the south pole
I guess it's a bug in the mapping tool that processes the input data and puts zero elevation there, while the surrounding terrain is at its normal height.
A cross-section
I think I leave it there. Space golf, anyone?