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Wind Cave near Hot Springs
Moss-like rock formations on cave wall.
Williams Canyon near Manitou. (Limestone formation).
A sandstone canyon with a sign visible on the left side that reads "CAVE."
Willi Unsoeld. 1963
An image of Willi Unsoeld's silhouette wearing a hat.
Will Siri in decompression chamber in Spring 1963
Will Siri in oxygen chamber
Will Siri in decompression chamber in Spring 1963
Will Siri in oxygen chamber