Capitol Reef National Park, Utah. Old Mammoth Road. Original image from Carol M. Highsmith’s America, Library of… Free Image from public domain license 
Monument Valley, perhaps the most enduring and definitive images of the American West. Original image from Carol M.… Free Image from public domain license 
Located in the southeast corner of California, the Imperial Sand Dunes are the largest mass of sand dunes in the state.… Free Image from public domain license 
NASA space shuttle Columbia hitched a ride on a special 747 carrier aircraft for the flight from Palmdale, California, to… Free Image from public domain license 
Russian search and rescue MI-8 helicopters are seen at the landing site of the Soyuz TMA-08M spacecraft in a remote area near… Free Image from public domain license 
Ponderosa pine at the A Bar A guest ranch, near Riverside in Carbon County, Wyoming. Original image from Carol M.… Free Image from public domain license 
A storm brews above the Firehole River in Yellowstone National Park in northwestern Wyoming. Original image from Carol M.… Free Image from public domain license 
A landscape view of Alaska - Original image from Carol M. Highsmith’s America, Library of Congress collection.… Free Image from public domain license 
A Durango & Silverton Narrow-Guage Scenic Railroad train, pulled by a vintage steam locomotive, crosses an alpine bridge in… Free Image from public domain license 
Onboard Apollo 11, Eagle prior to descent to the moon. Original from NASA . Digitally enhanced by rawpixel. Free Image from public domain license 
The Maroon Bells, just outside Aspen in Colorado's Rocky Mountains USA - Fall aspens in San Juan County, Colorado USA -… Free Image from public domain license 
Steam locomotives in the roundhouse of the Durango & Silverton Narrow Gauge Scenic Railroad in Durango, Colorado. Original… Free Image from public domain license 
Fall aspens in San Juan County, Colorado USA - Original image from Carol M. Highsmith’s America, Library of Congress… Free Image from public domain license 
Full views of Mir Space Station after undocking during flyaround. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
Space shuttle Endeavour lifts off from Launch Pad 39A at NASA's Kennedy Space Center in Florida, 8 Aug. 2007. Original from… Free Image from public domain license 
Antique plant Veronica drawn by Sarah Featon (1848–1927). Original from Museum of New Zealand. Digitally enhanced by… Free Image from public domain license 
Artist's concept depicts the top of the 2020 rover's mast. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 