Celebrate National Park Week with free admission on April 19 and explore the beauty, history, and music-inspired theme of more than 400 national park sites across the U.S.

National Park Week runs from April 19 to 27. Entrance fees are waived on the 19th and celebrations continue throughout the week.

To start off National Park Week, entrance fees will be waived at all national parks on Saturday, April 19, the National Park Service (NPS) says.