National monuments are protected areas of land that are designated by the government for their historical, cultural, or natural significance. These areas are set aside for preservation and public enjoyment, often containing important archaeological sites, geological formations, or unique ecosystems. National monuments are typically managed by federal agencies such as the National Park Service or the Bureau of Land Management. Examples of national monuments in the United States include the Statue of Liberty, the Grand Staircase-Escalante National Monument, and the Muir Woods National Monument.