However, the National Park Service topped the list of government agencies seen favorably by U.S. adults, according to a Pew Research study last July, and national parks are widely considered to be among America’s greatest treasures .

Yosemite National Park staff members hung a U.S. flag upside down to protest the layoffs at the park by the Trump administration. Credit: Anand K Sankaran via Storyful

A group of workers at California's Yosemite National Park positioned the U.S. flag on Saturday near the Horsetail Fall​ where crowds gather to witness Yosemite's annual firefall​.