Stock photography, photos: Slump Block Badland Stock photos of Sections of bluff slumping to the valley floor. Theodore Roosevelt National Park, North Dakota. Photograph: © Matthew Thalman Click for a larger image and more information Keywords associated with this stock photo: America, National Park, National Parks, North America, North Dakota, NP, Theodore Roosevelt National Park, Theodore Roosevelt NP, United States, United States of America, US, USA, badland, badlands