No listings currently available. No listings currently available. About seven miles west of McGregor by Hwys. Excavation revealed an underground river. Today boat tours explore the passageway and six chambers where the sounds the settlers heard originated, but the noises have stopped.
Tour is completely by boat on relatively shallow water-depth throughout is three feet or less.
Height of the overhead rock varies from high to low and in some spots boat passengers must hunch down. Speoleothems include stalactites, soda straw stalactites and stalagmites. The largest formation is Frozen Waterfall. Calcite and iron oxide are the principal minerals in the speleothems, but one, multicolored ribbon stalactite contains both of these and manganese, too. Temperature is 47 degrees Fahrenheit.