Lobby architectural details, Richard Sheppard Arnold U.S Post Office and Courthouse in Little Rock, Arkansas (2010) by Carol… Free Photo from public domain license 
San Francisco-Oakland Bay Bridge at Dawn. Original image from Carol M. Highsmith’s America, Library of Congress… Free Photo from public domain license 
This may not be a highway to nowhere in the American West, but it's a highway no one is on at the moment. Original image from… Free Photo from public domain license 
Huge cumulus clouds seem to swoop low over the Round Valley near Springerville, a community near the New Mexico border in the… Free Photo from public domain license 
The Redwood National and State Parks. Original image from Carol M. Highsmith’s America, Library of Congress collection.… Free Photo from public domain license