"On November 10, 2014, Kenny Lee Veach set out to re-discover a strange cave called the “M Cave”, as it was in the shape of an M, that he had found on a desert hike a few months before. The cave was in the Sheep Mountains, around 40 miles north of Las Vegas, and to the south of Area 51.
Despite warnings not to go back to locate the cave by a poster on an online forum, he headed out on his third trip to try and find the mysterious place."
https://www.strangeoutdoors.com/mysterious-stories-blog/kenny-veach
"The entrance to the cave was shaped like a perfect capital M. I always enter every cave I find, but as I began to enter this particular cave, my whole body began to vibrate. The closer I got to the cave entrance, the worse the vibrating became. Suddenly I became very scared and high-tailed it out of there. That was one of the strangest things that ever happened to me"
https://nevadamagazine.com/issue/september-october-2019/11423/
"In 2014 a mystery began when cave explorer and hiker Kenny Veach started talking about a mystery cave he had found on his YouTube channel. The cave was called the M Cave, due to what Kenny said was its shape. When Kenny found the cave he said that it made his body vibrate and made him afraid."
https://thephaser.com/2019/10/the-mystery-of-kenny-veach-and-the-m-cave/
Hiker Vanishes Looking for a Mysterious Cave in 'Area 51' Desert