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 secret base inside Mount Rushmore. In "", it is the secret base of operations for the protagonists. In the film, the base, along with the sculptures on the surface, are severely damaged in a suicide bombing by Michael Moore. In the universe of the "Ben 10" franchise, Mount Rushmore is the location of the main Plumbers (a sort of intergalactic police force) complex, and plays a key role in multiple episodes of the series, including "Secrets," "Truth", the "Ben 10,000" episodes, and "Ben 10 vs. The Negative 10." The monument is inadvertently destroyed by Upchuck in the latter episode, during