This unusual travertine pothole arch is located Last Chance Canyon in the Guadalupe Section of Lincoln National Forest in Eddy County, New Mexico. The arch is quite close to Sitting Bull Falls Recreation Area and not far from Carlsbad Caverns National Park and Guadalupe Mountains National Park. Horowitz Arch is named for Danny Horowitz, the person who first documented the arch. Danny was also the founding president of The Natural Arch and Bridge Society. Consequently, NABS is coordinating a petition to the USGS Board on Geographic Names requesting that they officially recognize this name. The arch has a span of about 20 feet and the top of the arch is about 80 feet above the plunge pool. Photo by Jay Wilbur.