The House of Mirrors is a section of Happyland Amusement Park.
Renfield invited Knuckles, Sonic, and the Knothole Freedom Fighters, with the aid of Dr. Ivo Robotnik, used the House of Mirrors to trap Sonic and the Knothole Freedom Fighters by tricking them into going into the mirrors themselves. Instead of being trapped in the mirrors, Knuckles' chaos-based powers were robbed from him. Robotnik allowed Knuckles to leave so that he would feel helpless without his powers. He fled and later met up with the other Chaotix members, including Heavy and Bomb. They then freed the Freedom Fighters and defeated the repaired Metal Sonic robot. Robotnik ditched Renfield who was then captured by Knuckles. Later, Renfield would reopen the park to the public. (KCX)
Happyland Amusement Park was on Angel Island.