Three of America's most well-known national parks -- Yellowstone, Grand Teton, and Smoky Mountains -- closed their gates Tuesday as people shut in because of the coronavirus, and lost more options for recreation.
They join a growing list of National Parks sites that have closed from New York to California, including the Statue of Liberty and Alcatraz. Rocky Mountain National Park in Colorado and Yosemite National Park in California have also closed. Other parks that remain open have closed shuttles, campgrounds, visitor centers and some trails to prevent the spread of COVID-19.