MAMMOTH CAVE, Ky. (WKRN) – A group of visitors at Mammoth Cave National Park in Kentucky got to see a rare sight on Sunday when a thick cloud of fog formed underground in the Rotunda at Mammoth Cave.

Dense fog formed inside Mammoth Cave National Park in Kentucky. Screengrab from Facebook post by Mammoth Cave National Park. A massive cave system in Kentucky seemed to create a weather system of its ...

Mammoth Cave is known as the worlds longest known cave system with more than 400 miles of surveyed passageways. Many of you have probably been to Mammoth Cave, as the park typically sees over half a ...

ERICA: WELCOME BACK. THIS IS PRTYET CL,OO THESE ARE PHOTOS POSTED BY MAMMOTH CAVE NATIONAL PARK. THAT’S RIGHT, YOU ARE SEEING FOG INSIDE AAV C THEY PUT THIS ON FACEBOOK AND THEY SAID AN UNEXPECTED ...