Yellowstone National Park – There's no time like the centennial anniversary of the U.S. National Park Service to visit Yellowstone National Park, the world's first national park . Grand Canyon National Park – Grand Canyon National Park is the second most popular national park in the United State, with 5.5 million visitors in 2015. Photos: U.S. News & World Report Best Vacations 2016 1. Hide Caption 3 of 25Photos: U.S. News & World Report Best Vacations 2016 4. Hide Caption 2 of 25Photos: U.S. News & World Report Best Vacations 2016 3.

Source: CNN June 28, 2016 04:53 UTC