Monuments Established: 9 Click to see them
Monuments Modified: 10 Click to see them
Years in Office: 1929-1933
Political Party: Republican
Hoover was the first president to establish a national monument reserving more than a million acres in the continental U.S. (Death Valley, 1933).
Hoover made three modifications to Petrified Forest National Monument, adding to the existing reserve in 1930, 1931, and 1932.
Image credit and additional information about Herbert Hoover at: