The U.S. National Arboretum was established by Congress in 1927. Nine miles of roads take visitors through the arboretum's 446 lush acres. A highlight of the drive is always at the heart of the arboretum where twenty-two Corinthian columns stand, each thirty-four feet tall, taken from the east entrance of the Capitol Building.
Within the Arboretum are many botanical exhibits from azaleas and formally landscaped gardens to exotic and rare trees. Some notable exhibits are the Slow Growing Conifer Collection and North America's first and most comprehensive bonsai museum. There are also many seasonal displays and an aromatic two-acre herb garden.