When the Smithsonian Institution brags that it has educated and entertained generations of Americans, it is not kidding. Wednesday marks the 165th anniversary of the Smithsonian.

Once bison grazed on the National Mall outside the Smithsonian Castle (Courtesy of the Smithsonian Institution)

To mark the occasion, the Smithsonian released this picture of the olden days when bison and other animals were part of the sights on the Mall.