The Met Collection

 Twenty-nine Views of Various People at Island Inn, Hobe Sound, Florida, Artist Unknown, ca. 1950

Twenty-nine Views of Various People at Island Inn, Hobe Sound, Florida, Artist Unknown, ca. 1950

 Two-Minute Silence, Armistice Day, London, Artist Unknown, 1919

Two-Minute Silence, Armistice Day, London, Artist Unknown, 1919

 Walker Evans and Shipmate, Aboard the Cressida, South Seas Trip, Artist Unknown, 1932

Walker Evans and Shipmate, Aboard the Cressida, South Seas Trip, Artist Unknown, 1932

 24 Portraits of Eliza Parkinson Reading Newspaper on Beach, Possibly Fisher's Island, New York, Walker Evans, 1950s

24 Portraits of Eliza Parkinson Reading Newspaper on Beach, Possibly Fisher's Island, New York, Walker Evans, 1950s

 119 Snapshots of Beach and Parade Scenes, Tournament Spectators, and Clambake, Blackpoint Country Club, Old Lyme, Connecticut, Walker Evans, July-August 1967

119 Snapshots of Beach and Parade Scenes, Tournament Spectators, and Clambake, Blackpoint Country Club, Old Lyme, Connecticut, Walker Evans, July-August 1967

 Beach Scene, possibly Coney Island, New York City, Leon Levinstein, 1960s-70s

Beach Scene, possibly Coney Island, New York City, Leon Levinstein, 1960s-70s

 Rockefeller Center, Leon Levinstein, ca. 1957

Rockefeller Center, Leon Levinstein, ca. 1957

 Nahant Beach, Lynn, Massachusetts, Nicholas Nixon, 1979

Nahant Beach, Lynn, Massachusetts, Nicholas Nixon, 1979

 New York, Harry Callahan, 1962

New York, Harry Callahan, 1962

 Chicago, Harry Callahan, ca 1950

Chicago, Harry Callahan, ca 1950

 Cape Cod, Harry Callahan, 1972

Cape Cod, Harry Callahan, 1972

The Met recently released a collection from it's archives for non commercial use. They've released 400,000 images total and 18,000 photographs. It's a great resource for students and artists looking for inspiration or images they can use for research. These were some of my favorites from the photography collection. I highly recommend browsing through them to see for yourself.

Another photo archive I've really enjoyed is National Geographic's Found. It's a great archive that spans over 100 years and I love their color images! I'd post some if copyright laws allowed but for now you'll have to check it out yourself.