Cold water shipwrecks are, quite often, some of the best preserved out there. You see this in the Great Lakes, you see it in the Arctic, and you see it in the Antarctic. Although that last one hasn't been well documented, for understandable reasons.
However, we do have one notable wreck. Endurance, the mothership of the Shackleton Expedition. A wreck discovered only two years ago, as of this upload. And a wreck that is in amazing condition, after a century underwater.
...aside from the damage caused by the ice, that is.
Still, Endurance is a time capsule. Not as easy to dive as Erebus or Terror, so one that is less well documented. But certainly still worth looking at, even if we'll probably never see the interior.
Masts Falling Video:
https://youtu.be/eKMw3jX2asI
Wreck Dive Video:
https://www.dailymotion.com/video/x88sn34
Expedition Website:
https://endurance22.org/