an Entity references as follows:
Current River Cavern is a show cave located in one mile west of Van Buren, MO on U.S. Route 60. The cave is located inside Cave Spring Park. The cave was first opened as a show cave in 1940 under the name "Cave Spring Onyx Caverns". Current River Cavern was formed exclusively by the stream that still runs through the cave; a rarity among Missouri caves. The cave is set in the Eminence Dolomite.