Due to seasonal extremes in temperature and the forces of gravity large blocks of rock have broken away from the main face of the Niagara Escarpment. The gradual shifting downwards of these huge blocks has produced the crevice caves. The Duncan Escarpment is part of the Niagara Escarpment Parks System and the Niagara Escarpment Biosphere Reserve. There are no visitor facilities. Visitors are asked to remember that the natural features are vulnerable and easily damaged.

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