The World’s 20 Best National Parks to Explore — and the Best Time to Go

The United States may have introduced the concept of national parks when it created Yellowstone National Park in 1872, but other countries quickly followed suit. Today, more than 100 nations have set aside lands in an effort to protect and preserve them for future generations. We’ve selected the best national parks in the world and provided tips for the best time to go, visiting on a budget, and maximizing your time while there.