On June 19, communities throughout the United States celebrate Juneteenth. While the federal government officially recognized the holiday in 2021, Juneteenth has a history dating back to 1866. The holiday honors the emancipation of enslaved African Americans in the United States, and celebrations range from parades to historical reenactments in national parks. This year, you can also celebrate Juneteenth by visiting one of America’s stunning national parks for free. The National Park Servic...