In the Forbidden Jungle, near the Temple, you will find a machine with a beam of light heading into it. Jump on top of the machine and break the extension that is capturing the light. A tower will rise beside the platform you are on. Jump down to the base of the tower, and then use the action button () to realign the beam so that it hits the next mirror. Follow the beams around until the beam is pointing in the Mayor’s windmill. Follow the beam to the windmill and talk to the mayor for a power cell and the trophy.