The National Gallery of Art maintains the 6.1 acre National Gallery Sculpture Garden on the National Mall. The plantings are American species of trees, shrubs, perennials, and ground cover. At the center of the garden is a large ornamental pool with sequenced water fountains. (In the winter, this pool is a skating rink open to the public.) Around the pool is a courtyard edged by long concrete benches.
Between the pool area and the decorative fence enclosing the entire garden are 21 large sculptures among the plantings. Our favorites of these sculptures are pictured below.

For more information, visit the official website for the National Gallery Sculpture Garden at http://www.nga.gov/content/ngaweb/visit/maps-and-information/sculpture-garden.html.