Go deeper into the history of each park with scholarly articles and essays from Oxford University Press, freely available for the centennial year.

Oxford Reference

Underground photography

Caves, by their nature, are fascinating and mysterious; not surprisingly, therefore, such photographs are avidly devoured by an awed public. In the USA Ray V. Davis (1894–1980) extensively photographed in what was later named Carlsbad Caverns in New Mexico, where he used a mortar‐like device to fire magnesium powder; the pictures of vast chambers led directly to the cave's designation as a National Park in 1923.

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