"Two people in background, 'The Rock of Ages in the Big Room,' Carlsbad Caverns National Park," New Mexico. Photographer:… https://www.rawpixel.com/image/8799744/photo-image-art-vintage-public-domainFree Image from public domain license
"Formations - detail, formations 'in the Queen's Chambers,' at the entrance. Carlsbad Caverns National Park," New Mexico.… https://www.rawpixel.com/image/8799721/photo-image-art-vintage-public-domainFree Image from public domain license
"The Giant Dome, largest stalagmite thus far discovered. It is 16 feet in diameter and estimated to be 60 million years old.… https://www.rawpixel.com/image/8799733/photo-image-art-vintage-public-domainFree Image from public domain license
"Close up view of 'Elevator House,' Carlsbad Caverns National Park," New Mexico. Photographer: Adams, Ansel, 1902-1984.… https://www.rawpixel.com/image/8799742/photo-image-plant-vintage-public-domainFree Image from public domain license
Ledbury Market House, An Episode Of The Wars Of The Roses... Third Edition published by W. North (1883). Original from the… https://www.rawpixel.com/image/572540/cavern-building-vintage-drawingFree Image from public domain license