Located near the center of the Promenade area, the Tunnel of Fun was a "dark boat ride", where patrons were beckoned by the voice of a mechanical Red Devil to board and ride, unrestrained, a small wooden boat at the base of a large, wooden, functional waterwheel, which forced a steady stream of water that slowly propelled the boats through a mostly dark, quiet, meandering tunnel. At various stages of the trip, the passing boat would trigger lighted scenes of "fright" and sound intended to surprise and startle the travelers, eliciting many shrieks and laughter which could sometimes be heard over the din of the waterwheel by the waiting or passing crowd outside. The beckoning Red Devil was situated in a glass covered pocket high up in the wall, to the observer's left of the large waterwheel, and for a time, was accompanied by a "Laffing Sam" who occupied a similar niche on the right side of the wheel. Each character had his own loudspeaker, which was attached to the outside of the wall, and over their head.