Tundra Rock is the 21st province (Stage 3 Province 3) of the Arctic Future, accessible (along with Manirak) after taking control of Avalanche to the south. Taking over Tundra Rock grants access to Patuktuq.
If previous sectors acquired by negotiation:
Maybe it's here? Only one way to find out.
If at least one sector taken by force:
There's nothing to find here. Nothing!
What did you think you'd find here?