Millions flock to the national parks every year to witness spectacular fall color light up the Great Smoky Mountains or to see the otherworldly geothermal pools in Yellowstone. Last year, in particular, was a banner year for national park visitation, according to newly released figures from the park service: The parks welcomed 325.5 million visitors to the more than 400 national park sites. The visitation numbers are up 4% from 2022, though not a full rebound from the years leading up to the pandemic when the parks saw nearly 330 million visitors.