Sen. Mitch McConnell and Rep. Brett Guthrie both filed the Mammoth Cave National Park Boundary Adjustment Act on Thursday.

Kentucky’s most well-known national park could be getting bigger, as U.S. Senator Mitch McConnell, R-Louisville, and U.S.

Under a swath of Kentucky hills and hollows is a limestone labyrinth that became the heartland of a national park. The surface of Mammoth Cave National ... Tour (there are three steep hills ...