Here's an update on some older bottles:
"Old whisky can be found in some pretty amazing places.
I've heard of it stashed in the walls of houses, buried under
ground, and discovered in shipwrecks under the ocean.
But the trove left by Antarctic explorer Sir Ernest Shackleton
might be the most unusual. Shackelton and his crew left
two cases of Scotch whisky stashed under the floorboard
of a small wooden shack at Cape Royds.
The whisky was discovered by conservators in January 2006.
They were unable to get the crates out but will be trying
again in January during the Antarctic summer. It's not known
what shape the bottles of Charles Mackinlay & Co. whisky will
be in after one hundred years of freeze and thaw. The crates
and bottles will remain in Antarctica unless they need to be
taken off the continent for conservation reasons."
More at
Unearthing Shackleton's Whisky
and
Whisky on (Antarctic) ice