Sully Hills National Park, at Devil's Lake (Fort Totten), North Dakota. Area 960 acres.
Platt National Park, Sulphur Springs, Oklahoma; on account of many mineral springs. Area 848 acres.
Mesa Verde National Park, Southwestern Colorado; on account of cliff dwellings, and wonderful cliff and canyon scenery. Area, 66 square miles.
National Monuments
Under a special act of Congress, the President of the United States has the power forever to set aside from private ownership and occupation any important natural scenery, or curiosity, or wonderland, the preservation of which may fairly be regarded as of National importance, and a duty to the whole people of the United States. This is accomplished by presidential proclamation creating a "national monument."
Under the terms of this act, 28 national monuments have been created, up to 1912, of which 17 are under the jurisdiction of the Department of the Interior, and 11 are managed by the Department of Agriculture. The full list is as follows:
| Alaska: | Colorado: | South Dakota: |
| Sitka | Wheeler | Jewel Cave |
| Colorado | ||
| Arizona: | ||
| Montezuma Castle | Montana: | Utah: |
| Petrified Forest | Lewis & Clark Cavern | Natural Bridges |
| Tonto | Big Hole Battlefield | Mukuntuweap |
| Grand Canyon | Rainbow Bridge | |
| Tumacacori | ||
| Navajo | New Mexico: | |
| El Morro | Washington: | |
| California: | Chaco Canyon | Mount Olympus |
| Lassen Peak | Gila Cliff Dwellings | |
| Cinder Cove | Gran Quivira | |
| Muir Woods | Wyoming: | |
| Pinnacles | Oregon: | Devil's Tower |
| Devil's Postpile | Oregon Caves | Shoshone Cavern |