techniques were applied in 1908. A significant epilogue to Bishop's story occurred in 1972, when a long-sought route connecting the caves of Flint Ridge and Mammoth Cave Ridge was discovered in an area which Bishop had mapped, but which had in the interim been almost completely flooded by the construction of a dam on the surface nearby: the area of the 20th Century connection route is shown on Bishop's 19th century map. It was declared a National Historic Landmark in 1986, as one of the few surviving residences associated with George Rogers Clark. Gallery See also Farmington Historic Plantation List of attractions and events in the Louisville metropolitan area List of the oldest buildings in Kentucky List of parks in the Louisville metropolitan area Riverside, The Farnsley-Moremen Landing List of National Historic Landmarks in Kentucky References External links Official Locust Grove website Locust Grove—Lewis and Clark Expedition: A National Register of Historic Places Travel Itinerary Houses completed in 1790 18th-century buildings and structures in Louisville, Kentucky Houses in Louisville, Kentucky Parks in Louisville, Kentucky Museums in Louisville, Kentucky Tourist attractions in Louisville, Kentucky Local landmarks in Louisville, Kentucky National Register of Historic Places in Louisville, Kentucky National Historic Landmarks in Kentucky Historic house museums in Kentucky Farms on the National Register of Historic Places in Kentucky 1790 establishments in Virginia Plantations in Kentucky