Petroglyph National Monument was created in 1990.
The area of Hovenweep National Monument is 3,172,735.4351616 square meters.
No. It is completely within the sovereign territory of the Navajo Nation, and thus outside the jurisdiction of the federal government. As such, it can not become part of the National Park System. It is instead a Navajo Tribal Park.
Navajo National Monument.
Wheeler National Monument was created in 1908.
National Monument to the Forefathers was created in 1889.
Biscayne National Monument was created in 1968.
Carrizo National Monument was created in 2001.
Pinnacles National Monument was created in 1908.
Hovenweep National Monument was created in 1923.
Pipestone National Monument was created in 1937.
Cabrillo National Monument was created in 1913.
Mukuntuweap National Monument was created in 1909.