Some tourists have been getting too close to wildlife in national parks.pchoui/Getty ImagesTourists have been flocking to US national parks in droves in recent years. The growing interest comes as some Americans are moving away from cities to be close to nature. But as more visitors crowd into national parks, some behave badly and disrespect the environment.Getting out in nature has never been so hot.In 2023, the National Park Service (NPS) recorded over 325.5 million recreational visits to the 63 parks in the United States, 13 million more than the previous year.