By Lantern Light (2017)

A young boy, against his father's wishes, decides to quite school at age 10 to become a cowboy in the gritty south New Mexico Territory desert. Six years into his wrangling career at XXX Ranch a strange crevasse in the earth sparks his attention and imagination. This is the story of Jim White-the cowboy adventurer and explorer who discovered Carlsbad Caverns, fought for National Park status, and turned it into one of the most visited tourist attractions in the southwest.