you go to a musical mueseum go right in the muesem pass up all of the statues then there will be a free instrument you will play it for the statue with the Flute in her mouth then she will give you an item use that for the flower on the door to the underworld.then the dauter of zues will give you clues.
with Ur reed
There are doors to open on almost every island on Poptropica. Specify an island name and you may find an answer.
You don't have to open it. It is open already, and you could just go in.
you have to get the pomegranates from the pomegranate tree in the area where the sphinx is. then set it on the offering table.
Use you pipe to play the colors on the door in the order given then the doors will open
the guard dog if the underworld
Pomegranate will let you proceed to the entrance to the underworld.
To use as an offering to go in the underworld
In the Underworld after crossing the river of dead.
you have to go get fruit and give it to him
Use the mirror Aphrodite gave you.
They DON'T open both. The pomegranates only open Hades' door to the underworld put them on his alter in Mythology Island. To open Poseidon's door to his his awesome beach, you need the starfish off of his statue in the museum.