I visited all the major US national parks and ranked them based on factors like beauty and crowd size. My favorites include ...

National Park Week is coming April 19, offering visitors a chance to see some of the treasured U.S. landmarks for free.

After visiting all 63 national parks in the US, my favorites include Yosemite and Grand Teton. I think one of the worst parks is Gateway Arch.

Journey with us into the awe-inspiring ... amidst the vastness of the parks. While in Grand Canyon National Park opt for independent touring or join an optional once-in-a-lifetime flightseeing ...