"Yosemite's Rare 'Firefall' Phenomenon Is Back — Here's How to See It This Year Year after year, Yosemite makes the list of most-visited national parks in the U.S. — and with good reason. Millions of visitors flock here to marvel at its mountain-studded landscape, lakes, and waterfalls. While there's no bad time to explore Yosemite National Park, a visit in February allows for views of a unique ..