you have to play the song written on the door,
you need a pomegranate from above the sphinx
Get pomegranates from the tree above the Rainbow Sphinx thing and place them on the altar. The door will then open and you'll be let in.
There are pomegranates in the Garden, just above the Sphinx. Place them on the altar to open the door into the Underworld.
The Golden Apple is atop the Tree of Immortality. The pomegranates are on a tree above the Sphinx in the Garden.
When you are at the Sphinx's place, there is a rock above her and in order to get passed the door you will have to play tunes on the door on your pipe. If you hadn't gotten a pipe yet then go to Apollo's temple and get one.
A pomegranate from the garden of the Sphinx (the tree is above the Sphinx).
Get the moon rock and put it on top
Above the sphinx and to the side a little.
us the pomgranites you get near sphinx on the platform next to the door
On your way to the Minotaur, in the garden of the Sphinx, you go above the Sphinx and there should be a sign and a tree with them on it. Just click them.
Go to the Garden Of The Sphinx. Climb up and make the water flow. Then climb above the Sphinx to get the pomegranetes.
Its in a tree above the Sphinx.