The Geographic South Pole marker is moved each year to correct for the 2 mile thick cap of shifting ice the station is built upon. Often when visitors come to the South Pole, they don't even bother with this marker opting instead for the more picturesque Ceremonial marker. Hard to imagine traveling all that way and not standing at the absolute bottom on the planet! Also the spot for the purest air on the planet! Oh, and there's that darn Sun Dog again! Mother Nature can be such a photo bomber!