The Wendigo Cave - 100 :
Kerwood Mine - 57 :
Big Bend Tunnels - 52 :
Carleton Mine - 40 :
Around 30 can be found throughout the long tunnel under state route 65, between the abandoned Bog Town and Watoga. Look for tunnel openings along the highway.
28 can be found at the abandoned waste dump around the cave, five of which are on the ceiling and require the Marsupial mutation or a jet pack to access them.
29 can be found throughout Uncanny Caverns.
26 can be found in Gauley Mine.
20 can be found in Fort Defiance.
19 can be found in Atlas Substructure.
15 can be found at the Whitespring service entrance near the dumpsters.
15 can be found in the Emmett Mountain disposal site in the small cave that connects the generator room on the right side with storage site B.
Seven can be found in the Carson family bunker.
Around seven can be found in the Deep, in the cave sections before entering the Motherlode Acquisition Facility.
Five can be found inside the Rusty Pick (two near the restroom in the main bar area, and three downstairs about halfway through the tunnel).