The Duke and Duchess Cambridge have set off on their walk at the base of Uluru.
Traditional owner Sammy Wilson will guide the royal couple on the Kuniya walk to the Mutitjulu waterhole.
He says they'll be told the significant story of Kuniya (woma python woman) and Liru (poisonous snake man) and see the many striking features left by these Anangu ancestral beings.
"For Anangu, stories like these are more than a way to describe features in a landscape. Kuniya and Liru teach children the proper way to behave, to honour their responsibilities. They teach us that women have the right to defend their children if necessary," he said.
"As Anangu children grow, they are taught deeper levels of Tjukurpa (traditional creation law). As their knowledge grows, so does their responsibility to keep country and culture strong."
The Cambridges have spent the afternoon in Central Australia, including a welcome to country ceremony.
After the walk, the royal couple were taken to a special viewing point to watch the sunset over the rock.
The viewing was a late addition to their schedule that was kept under wraps to give the royals a rare moment of intimacy - albeit one still captured by a handful of authorised media.
William and Kate will spend the night - their first away from George in Australia - at the exclusive Longitude 131 resort, situated in the desert close to Uluru.