The National Arboretum is a living museum located in Washington, D.C., dedicated to the study and display of trees, shrubs, and other plants. It covers 446 acres and features various gardens, collections, and research facilities. Visitors can explore diverse landscapes, including the famous National Bonsai and Penjing Museum, which showcases intricate miniature trees. Established in 1927, the National Arboretum serves as a center for botanical research and education. It is home to over 22,000 plants, including the U.S. National Champion Trees, which are recognized for their size and significance. The arboretum offers a peaceful retreat for nature lovers and educational programs for all ages.