National Bonsai & Penjing Museum (one of the largest collections outside Asia)

The National Bonsai & Penjing Museum at the U.S. National Arboretum houses an internationally significant collection of bonsai and penjing trees and is often described as one of the largest such collections outside Asia. The museum's holdings include historic specimens, many donated or cultivated over decades, and it serves as a major center for public display, conservation, and education of bonsai art in the United States. Comparisons with other international collections exist, so exact rankings can differ by source.