 KY 70 is the main route through Mammoth Cave National Park in Edmonson and Barren Counties.KY 70 traverses the Mammoth Cave National Park before entering Barren County, traversing the exit 53 interchange of Interstate 65, and meeting Kentucky Route 90 and then US Route 31W in Cave City, which is the core part of a tourism hotbed in Barren County because of the close proximity to the Mammoth Cave National Park.Most of KY 70 from Brownsville to Cave City is designated as an official Kentucky Scenic Byway.