During the last government shutdown, national park areas were left open to visitors but without services such as restrooms and with few staff members on duty. The National Park Service logo is displayed at Glen Canyon National Recreation Area in Page, Ariz., on July 10. — Liz Ruskin, Alaska Public MediaColoradoRocky Mountain National Park was the fifth-most visited national park last year. “Leaving national parks open without National Park staff to help protect visitors and resources is not only irresponsible—it’s dangerous,” Thompson wrote in a statement to KQED. He points to the destruction of trees at Joshua Tree National Park during the 2019 shutdown.