Photos: Every National Monument President Obama Has Declared

The Organ Mountain Desert Peaks National Monument, near Las Cruces, N.M.

The Organ Mountain Desert Peaks National Monument (New Mexico): The 496,000 acre land near Las Cruces, N.M. holds rich scientific and historical value. The land was a training site for the Apollo Space Mission and World War II aerial targets, as well as a heritage site containing early pictographs from Native Americans Les McKee—AP

The San Juan Islands National Monument (Washington): A chain of 450 islands located in Washington State's Puget Sound, the monument offers visitors the chance to experience the natural beauty of the undeveloped, rugged landscape.Craig Hill—MCT/Getty Images

The Río Grande del Norte National Monument (New Mexico): Located northwest of Taos, the Río Grande del Norte contains stretches of the Río Grande Gorge and is known for its spectacular landscapes, recreational opportunities, and for serving as an important habitat for many birds and wildlife.Robert Alexander—Getty Images

The Harriet Tubman Underground Railroad National Monument (Maryland): A new national park, located on Maryland's Eastern Shore, commemorates the life of the most famous conductor on the Underground Railroad. MPI/Getty Images

The First State National Monument (Delaware): This new monument will tell the story of the early Dutch, Swedish, Finnish and English settlement of the colony of Delaware, as well as Delaware's role as the first state to ratify the Constitution. Shown above: Mill buildings standing along Brandywine creek north of Wilmington, Del.Walker Evans—Time & Life Pictures/Getty Image

The Charles Young Buffalo Soldiers National Monument (Wilberforce, Ohio): The home of Col. Charles Young, a distinguished officer in the United States Army who was the third African American to graduate from West Point and the first to achieve the rank of colonel.MPI/Getty Images

Cesar E. Chavez National Monument (California): The home of the famous civil rights activist and labor leader, known as La Paz, spans 116 acres in Kern County, Calif. The property was also the former headquarters of the United Farm Workers. Arthur Schatz—Time & Life Pictures/Getty Images

Chimney Rock National Monument (Colorado): Located in the San Juan National Forest in southwestern Colorado, the monument encompasses 4,726 acres and an archaeological site. The site is the ancestral home of the Pueblo Indians.Hyoung Chang—Denver Post/Getty Images

Fort Ord National Monument (California): Fort Ord served as an army post from 1971 to 1994. It was one of the most desirable posting locations because of the scenic views and proximity to beaches. Fort Ord is now a beautiful recreational area with unique landscape features that everyone can enjoy. Vern Fisher—AP

Fort Monroe National Monument (Virginia): Fort Monroe is a former U.S. military base, but its history goes back much further. The land was integral to the original Jamestown colony settlers and was set up as a key defense point under John Smith, Christopher Newport, and the Virginia Company in the early 1600s. Stephen M. Katz—AP

Prehistoric Trackways National Monument (New Mexico): Prehistoric Trackways is the 100th U.S. National Monument and the first designated by Barack Obama. Located in the Robledos Mountains of southern New Mexico, the monument site includes a vast array of fossilized footprints, plants, and petrified wood from the Paleozoic Era. AP

More Must-Reads from TIME