Description: [caption id="" align="aligncenter" width="408" caption="Roof of the United States National Museum (now the National Museum of Natural History) and Buildings of the City of Washington, D.C., c. 1920s, by Unknown photographer, Photographic print, Smithsonian Institution Archives, Record Unit 562, Box 1, Negative Number:2003-19563. "][/caption]
Description: [caption id="" align="aligncenter" width="430" caption="Civil Works Administration Project workers construct a trail to the Bird House in the National Zoological Park in March 1934, The Bird House appears in background, Depression era programs allowed the Zoo to build and renovate many facilities, 1934, by E. Hardy, Photographic print, Smithsonian Institution Archives Record,