Edmonson County is home to Mammoth Cave National Park. Brownsville serves as the county seat for this sparsely populated county known for cave country tourism, affordable land, and minimal development pressure. Fayette County is home to Lexington, Kentucky's second-largest city and the heart of the Bluegrass Region. Known for horse farms, rolling pastures, and strong land values, Fayette County offers urban amenities alongside agricultural heritage. County seat: Lexington.