This is a part of Uluru that has been weathered away at the base of the rock. Rocks coming out of the wall look like faces.
The story goes that a rival tribe called the Mulgas cast a spell and sent a devil dog to attack the Mala tribe. Many of the Mala tribe fleed the rock however five men stayed behind to protect the Mala escape. It’s said that these five rocks are those five men and that they stay there to keep watch over the Mala people.