My Sources

As far as I can determine, images from these sites are in the public domain or have been released under the equivalent Creative Commons License 0. Please take time to verify the copyright status of any image you download. I update this page often, so check back from time to time.

Central Intelligence Agency (CIA): Regional and World Maps

Creative Commons (500 million free images, but not all are public domain)

flickr: Biodiversity Heritage Library (240,000+ antique photos)

flickr: Biodiversity Heritage Library Jardin de la Malmaison (Pierre-Joseph Redouté)

flickr: The Commons

flickr: Great Sand Dunes National Park

flickr: John James Audubon Collection from Biodiversity Heritage Library (BHL)

flickr: NASA on The Commons

Government of Canada: Reference Maps

Library of Congress

Library of Congress: WPA (Work Projects Administration) Posters

Maps of the world

NASA Earth Observatory

NASA Earth Observatory Explorer

NASA Jet Propulsion Laboratory Photojournal

NASA Jet Propulsion Laboratory: Visions of the Future (Vintage-style Space Travel Posters)

National Archives and Records Administration NARA

The National Audubon Society: John J. Audubon’s The Birds of America (illustrations and descriptive text)

National Gallery of Art: John James Audubon

New York Public Library: Pierre-Joseph Redouté’s Les liliacées (1805-1816)

New York Public Library Public Domain Collection

New York Public Library: Robert John Thornton’s Temple of Flora

Old Book Illustrations


Picryl (5.8 million public domain images)

Picryl: Detroit Publishing Company (6469 photochrom prints)

Picryl: Antique and Vintage Travel Posters


Public Domain Pictures


Rawpixel: Francois Levaillant’s Natural History of Parrots (1801-1805)

Rawpixel: John James Audubon’s The Birds of America

Rawpixel: John James Audubon’s The Viviparous Quadrupeds of North America

Rawpixel: Kingdom Animalia (vintage animal images)

Rawpixel: Nile Illustrations by David Roberts (1796-1864)

Rawpixel: Pierre-Joseph Redouté’s Les liliacées (1805)

Rawpixel: Robert John Thornton’s The Temple of Flora


Smithsonian Institution Photos and Images

Smithsonian Libraries Image Gallery


USDA Vintage Pomological (fruit) Watercolor Collection

U.S. Geological Survey

Wikipedia Commons

Wikipedia Commons: Thirty-Six Views of Mount Fuji (46 prints by Hokusai)