Bisti/De-Na-Zin Wilderness in northwestern New Mexico is a protected badlands landscape of about 45,000 acres, expanded in 2019 and managed mainly by the Bureau of Land Management. Its Navajo name reflects both adobe formations and the image of a standing crane, echoed by nearby crane petroglyphs. The area is especially important for geology and paleontology: it is the largest easily accessible badlands in the San Juan Basin and exposes a notably complete sequence of rock layers across the Cretaceous-Paleogene transition. Those formations preserve evidence of changing environments, dinosaurs, and later Paleocene mammals, while the stark hoodoos and eroded terrain make it a destination for outdoor recreation and photography.