Switch Star of the Fortress
From the Super Mario Wiki, the Mario encyclopedia
The Star Switch is on the path around the fortress's back, hidden under a Brick between two pillars. After the player hits the switch, the Power Star appears inside a Star Sphere at the end of the path, and the player must run to the other side of the fortress in a short amount of time to collect it. If the time runs out, the Star disappears and the switch must be pressed again to make the Power Star reappear.
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