Sønderstrømfjord in Greenland is one of the most demanding approaches in the world, the app. procedure is done between mountains and glaciers, sharp and frequent turns are required for tjhe approach.
At final the pilots see a mountain behind the runway, so braking is crutual, although the mountain isn't located just behind the runway, it sure raises the crews puls a tad:O)
The airport is a former USAF base, it still is, but mainlty it's tourists.
SAS flies to the city two times a week or so, with 767's, so if that's not a challenge then I do not know what it is...
"If you believe breaking is possible, believe in fixing also"-Rebbe Nachman