An interesting cave near Steamboat Springs, Colorado

https://www.outtherecolorado.com/bizarre-find-in-deadly-cave-near-colorado-ski-hill/?fbclid=IwAR0aokkrN7jGkb5nfpWsCilopd7vyr_bm39MMxniXCtBkYyq1xTJFADP4-I

Have been to this town a couple of times over the years, but never heard of this.