Egypt - Sanctuary of the Scion (part 12)
Tomb Raider Anniversary - Visual Walkthrough
Use the other piece of the scion and you've finally made it. The door will open. Head inside and you can enjoy the cutscene.
The cutscene is also interactive so make sure you dodge the �happy team�.
Lara will ride her cool bike and jump inside the boat so it's time to head to Natla's mines.