[Oxidation]

0N0E, maybe (Null Island)? Depending on if latitude and longitude count as coded or not.

Otherwise "Burj tip" could be quite good (centimetres).

[knodi123]

I don't think 0n0e would count- too coded.

But "Burj Tip" is great, it might have won the contest (judging involved lots of arguing)! Alas, we already ate the prize though, so you're out of luck.

[Symbiote]

K2 peak

Top K2

90°S

0,0

Ø in Denmark doesn't really compete, nor the many villages called Å in Norway.

For the opposite, the most area with the fewest letters, Io, Sun and Space.