Rushmore Cave Rushmore Cave Rushmore Cave is the closest show cave to Mount Rushmore National Memorial in the United States. It contains a wide variety of natural formations. It is the ninth longest cave in South Dakota. It measures a distance of . It was discovered in 1876 when a log flume that supplied water to mining operations in town of Hayward broke and spilled onto the side of the hill. As the water flowed down the hill it started flowing into a small hole in the hillside. The local miners who went up to fix the flume noticed this abnormality and
Mount Rushmore in popular culture the final battle with the Forever King. Another group shown as having a secret base inside the mountain is the "All Purpose Enforcement Squad" of "Young Justice", in the DC Universe series. The comic book superhero Mister Majestic, a character in the Wildstorm Productions universe, also had a secret base of operations inside Mount Rushmore, analogous to Superman's "Fortress of Solitude". In "", a 1981 animated movie jointly produced by Hanna-Barbera and Tsuburaya Productions, the heroic Ultra Force is headquartered within Mount Rushmore. Mount Rushmore was a primary location of interest in the plot of the 2007 film "" starring