|Location:||Thayer, Route 3.|
|Classification:||Collapsed Cave Natural Bridge|
|Address:||Grand Gulf State Park, Route 3, Box 3554, Thayer, MO 65791, Tel: +1-417-264-7600.|
|As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then.
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Grand Gulf is an exceptional and rare karst feature, a spectacular collapsed cave system. A narrow gorge stretches for nearly two kilometers with walls almost 40 m high, making the chasm deeper than it is wide.