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To get to hades castle: Go all the way to the end of the island and there is his castle. There will be an offering table. Find pomegranates and put them on the table. A door will open. Take it from there.
first you get the starfish at the museum of poseidons face then go to poseidon castle and put the starfish there and go inside and you are at the beach
you don't.
You get the cordniteres on Astroknights island from the castle from the King and Queen.
go to the window
Just to the right of the Village in the opening location. The three areas of the island are the Village, the Castle, and the Mill.
the water spray outside the castle
On the top of the castle
There is a castle on Astro Knights Island, in the kingdom of Arturus.
If you land back on Poptropica, your spaceship is parked atop the castle. This is also its location when you have beaten the island.
It is in astro knight island. There is a secret in the libary in the castle that helps you.
once you get in the castle you need to put it in the fireplace