The Lost River Greenway is free to walk for people who live in or near Bowling Green, Kentucky, or for visitors.
This is a scenic walkway right by Lost River Cave.
Right now at the Lost River Cave website they have a coupon for $1.00 off adult or senior tickets and $.50 off for children's tickets to go on the Underground Boat Tour and Guided History Walking Tour.
I think you will see just how scenic and beautiful this area is from these pictures of my Greenway walk. I even got to meet the Director and tour guide at Lost River Cave that day.