NPS / David Restivo/NPS toggle caption NPS / David Restivo/NPS Grand Prismatic Spring in Yellowstone National Park. Yellowstone is America's original national park and hosts more than 4 million visitors annually. NPS / David Restivo/NPS With the COVID-19 pandemic apparently coming to a close, many Americans are preparing for a no-holds-barred summer filled with many activities that the coronavirus has outlawed for more than a year. Here are some tips from the National Park Service to help visitors make the most their trip. Plan Your Visit Some destinations like California's Yosemite National Park implemented an entrance reservation system to better manage visitors during the pandemic. And even though pandemic restrictions are being lifted left and right, Yosemite plans to continue enforcing a limited number of daily visitors through the end of September 2021.