The National Zoological Park was established by an Act of Congress in 1889. By 1900, the Zoo's size had increased significantly due to three successive additions, which were followed by additional land acquisitions in 1921 and 1923, as well as a slight decrease in size with the construction of Beach Drive in 1966.
The present site of the National Zoo was chosen due to its picturesque character, its rugged terrain with numerous hills, and its location in Rock Creek Valley. While many structures that impinge upon the landscape were constructed throughout the 20th century, the area still retains its rugged, green magnificence, and the alternating views from the valleys and hills provide great visual excitement. The exhibition area is located in the northern half of the park, and the southern portion is lightly built upon.
The site includes about 15 historic buildings, constructed between 1892 and 1940.
DC Inventory: November 8, 1964(Joint Committee on Landmarks)
National Register: April 11, 1973
]]>Over the years, Holt House has come to be associated with Presidents John Quincy Adams, Andrew Jackson, and Martin Van Buren, but no substantial evidence has been uncovered to support these claims. Since 1891, it has served as the administrative headquarters for the National Zoological Park. The Holt House is generally assumed to have been built in 1805; however, the earliest construction date that can be confirmed is 1827.
The first mention of the house in any official records is a reference to the building in the 1831 will of Roger Johnson. The Johnson family owned the property from 1809 to 1835. The tract of land upon which the house stands was originally called "Pretty Prospect," but came to be known as "Jackson Hill" by 1841.
DC Inventory: November 8, 1964 (Joint Committee on Landmarks)
National Register: April 24, 1973
]]>