Astronomical fall begins on Monday, meaning the farewell to summer begins this weekend. So, why not visit one of our nation’s beautiful and majestic National Park? Mammoth Cave National Park Ranger Molly Schroer joined FOX Weather on Sept. 17 to explain why Mammoth Cave is worth the visit anytime of the year. #foxweather #mammothcave #mammothcavenationalpark #nationalpark #us #outdoors #recreation #nature #kentucky