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
Charles E. Rushmore of the four presidents' heads on the mountain - the largest single contribution. The Memorial was dedicated by President Coolidge on August 10, 1927. Rushmore was also a member of the Phi Gamma Delta Fraternity. Mr. Rushmore was also a member of Kane Lodge No. 454, F&AM (NYC). Charles E. Rushmore Charles Edward Rushmore (December 2, 1857 – October 31, 1931) was an American businessman and attorney for whom Mount Rushmore is named. Born in New York City, he was the son of Edward Carman Rushmore and Mary Eliza (née Dunn) Rushmore, of Tuxedo Park, NY. He was married to