The Birth of the National Parks
"Triggered by westward expansion, the national parks idea began picking up steam in 1864 when several California state leaders dedicated themselves to protecting the natural wonder known as Yosemite Valley. Shortly after acquiring the valley as a state park, more parks began taking shape across the nation. In Wyoming, Yellowstone became the first national park when it was established by the United States Congress and signed into law by President Ulysses S. Grant in 1872. Since that time, the National Parks Service has grown to maintain over 84.4 million acres across 450 specially designated areas including parks, monuments, memorials, recreational areas, military parks, and more."
"Triggered by westward expansion, the national parks idea began picking up steam in 1864 when several California state leaders dedicated themselves to protecting the natural wonder known as Yosemite Valley. Shortly after acquiring the valley as a state park, more parks began taking shape across the nation. In Wyoming, Yellowstone became the first national park when it was established by the United States Congress and signed into law by President Ulysses S. Grant in 1872. Since that time, the National Parks Service has grown to maintain over 84.4 million acres across 450 specially designated areas including parks, monuments, memorials, recreational areas, military parks, and more."
From here! Thanks T.