If it’s possible to identify exactly where it begins and ends, one might say the artwork started in a simple white-stucco storefront in Quemado, New Mexico. Inside a low-ceilinged room, a stack of release waivers on a clipboard reminded guests of the risks of walking through uneven terrain, or encountering the occasional rattlesnake. Overhead, a small clock ticked by. The Lightning Field, a land-art installation by Walter De Maria completed in 1977, is a place I’d wanted to visit ever since I’d moved to the Southwest. Last month, I finally got the chance.