The Grand Staircase-Escalante National Monument is a U.S. National Monument protecting 1,880,461 acres of land in southern Utah. Grand Staircase-Escalante remains the largest national monument in the United States - spanning 1.9 million acres of America's public lands. A landscape roughly the size of Delaware, the Monument was the last place in the continental United States to be mapped.
Grand Staircase-Escalante NM
https://www.blm.gov/programs/national-conservation-lands/utah/grand-staircase-escalante-national-monument
https://en.wikipedia.org/wiki/Grand_Staircase-Escalante_National_Monument
The Grand Staircase-Escalante National Monument is a U.S. National Monument protecting 1,880,461 acres of land in southern Utah. Grand Staircase-Escalante remains the largest national monument in the United States - spanning 1.9 million acres of America's public lands. A landscape roughly the size of Delaware, the Monument was the last place in the continental United States to be mapped.