Your eyes do not deceive you. These gentle and majestic creatures before you are indeed giraffes. When going on safari, the game parks have watering holes set up - be they natural or aided by the park you can visit to try and see the animals getting some refreshment. It seems like a win-win to me - the animals get a reliable source of water, which can at times be hard to find, and the visitors get increased chances of seeing beautiful creatures.
When self-driving through Etosha National Park, I often found myself alone at the watering holes - especially as I traversed from west to east. The western section of the park is only open to you if you stay at one of the lodges there, so I highly recommend that if you have the time. Having a watering hole to yourself to enjoy viewing the animals is tremendous. I hope it doesn't become too popular since I wouldn't mind going back for the secluded game viewing again!
Giraffes find me interesting, but don't seem to have the manners not to stare.