by the Creek and (to a lesser extent) Cherokee peoples. In the early 19th century, the area was known as Rock Mountain. After the founding of DeKalb County and the county seat of Decatur in 1822, Stone Mountain was a natural recreation area; it was common for young couples on dates to ride to the mountain on horseback. The mountain is easy to climb and there has been a path since the nineteenth century. Entrepreneur Aaron Cloud built a wooden observation tower at the summit of the mountain in 1838, but it was destroyed by a storm and replaced by a much smaller tower in 1851. Visitors to the mountain would travel to the area by rail and road, and then walk up the mountaintop trail to the top, where Cloud also had a restaurant and club. Granite quarrying started at Stone Mountain in the 1830s, but became a major industry following the completion of a railroad spur to the quarry site in 1847. This line was rebuilt by the Georgia Railroad in 1869. Over the years, Stone Mountain granite was used in many buildings and structures, including the locks of the Panama Canal, the steps to the East Wing of the United States Capitol and the Imperial Hotel in Tokyo. In recent years, granite suppliers in Georgia sent stone samples cut from Stone Mountain to the group responsible for planning the Martin Luther King Jr. Memorial in Washington, D.C.; the foundation later chose to use granite imported from China. Quarrying during earlier periods also destroyed several spectacular geological features on Stone Mountain, such as the Devil's Crossroads, which was located on top of the mountain. In 1887, Stone Mountain was purchased for $45,000 by the Venable Brothers of Atlanta, who quarried the mountain for 24 more years, and descendants of the Venable family would retain ownership of the mountain until it was purchased by the State of Georgia in 1958. Martin Luther King Jr. mentioned the monument in his "I Have a Dream" speech at the August 1963 March on Washington for Jobs and Freedom, when he said "let freedom ring from Stone Mountain of Georgia!" During the 1996 Summer Olympics, Stone Mountain Park provided venues for Olympic events in tennis, archery and track cycling. The venues for archery and cycling were temporary and are now part of the songbird and habitat trail. Some of the outdoor scenes for