The area is famous for the Marfa lights, also known as the Marfa ghost or spook lights. They have been observed near U.S. Route 67 on Mitchell Flat east of Marfa, Texas, in the United States. Onlookers have ascribed them to Fortean phenomena such as UFOs or will-o'-the-wisp.
"One of the best-known [ghost lights] occurs in the mountains of the Trans-Pecos region of far West Texas, between the small towns of Alpine and Marfa, where the Marfa Lights have been seen by” many generations of West Texans, wrote Rob Riggs (September 7, 1945 - November 3, 2015) in his In The Big Thicket.
The first published account of the lights appeared in the July 1957 issue of Coronet magazine. In 1976, Elton Miles' Tales of the Big Bend included stories dating to the 19th century, and a photograph of the Marfa lights taken by a local rancher.
The earliest anecdote commonly cited for the observation of the Marfa Lights is that of the cowboy Robert Reed Ellison in March 1883. This was while he was herding cattle through the Paisano Pass southwest across the Marfa plain. Then the lights are seen again in 1885 by Joe and Anne Humphreys. Both stories appear in Cecilia Thompson's book History of Marfa and Presidio County, Texas 1535-1946.
Bunnell lists 34 Marfa lights sightings from 1945 through 2008. Monitoring stations were put in place starting in 2003. He has identified "an average of 9.5 MLs on 5.25 nights per year," but thinks the monitoring stations may only be finding half of the MLs in Mitchell Flat. Source.