massive-sinkhole-formed-Cedar-Sink-at-bottom-of-mammoth-cave-national-park By kalpana mishra in No Comments Mammoth Cave National Park – It was very dark out there except for few lights. Shot at low shutter speed and high exposure. This resulted in the cave showing its true colors thats not visible to the naked eye. Share this:TwitterFacebookLinkedInRedditTumblrPinterestLike this:Like Loading...