Sun Tower

In the very center of the northernmost Ray Island lies a tall tower made of a mixture of ivory stones and gold. It reaches up to the heavens, glimmering under the light of the sun.
The inside, though dusty, has been kept in good repair; crimson carpets line the main halls, large windows allow as much light in as possible, and the rooms are spacious and full of golden hued furniture.
The door to the very top of the tower is locked, though it is rumoured there are treasures to be found within...