This photo was taken by Irv Wiswall during his trip to visit the Wind Cave. He was a teacher at that time and took a scholastic interest in this subject.
The hole in the Wind Cave's ceiling is protected by a fence. It is easily seen from the parking area near the cave's foremost entrance.
Standing directly over the Dark Hole, this shot reveals water collected on the cave floor, reflecting Irv. This startling image looks like a creature's eye.
Bring your grade-school imaginations while reading, or listening, to this book.
The Deschutes County library had copies of the Bend Bulletin, issue 163, 1969, on film. They provided me with published images taken during the investigation.
This shot was taken by the crime scene photographer, and published. What is cropped in this picture are the vehicles on the ridge above this small second entrance.
Skylight. Mystery. Similar to the the Wind Cave's "Dark Hole," this is from the "Skylight Cave," 50 miles NW of "Arnold-- ." From the inside the cave's vaulted ceiling it casts strange shadows and distorts sunlight. Gus: http://marsunderground.org/caves/
On your phone, or tablet, you can zoom in closer to this photo. It is amazing how cave features give the impression of a couching beast.