The Lost River was a very old chute the chutes and sort of dark ride combined. The boat entered a tunnel and inside were different "scenes" of a jungle type setting. This type of ride, with different scene styles for a park's own individuality, was common in the earlier 1900's at many parks. For example, Euclid Beach called theirs "Over The Falls". Inside were lit scenes of miniature waterfalls with running water.Idora's displays were kind of cheesy, but unlike many flume rides today, at least it had theming!