In 1890.
Theodore Roosevelt.
For over 103 years. It was declared a U.S. National Monument on December 8, 1906.
National is an adjective; monument is a noun.
105 years old since it was declared a national monument
Congress passed a bill making it a national park. Before that it was a national monument.
Petroglyph National Monument was created in 1990.
February something.
Benjamin Harrison.
The Giant Sequoia National Monument comprises 328,315 acres of California's Sequoia National Forest. It was designated a National Monument in April 2000.
The Washington Monument
Grand Canyon
george washingtons birthday