"GERONIMO
NAMED FOR THE REBELLIOUS MEDICINE
MAN WHO LED THE CHIRICUHUA APACHES
ON THEIR LAST RAIDS, TO SURRENDER,
AND THEN INTO EXILE IN FLORIDA AND 
OKLAHOMA. THEIR DESCENDANTS LIVED 
IN EASTERN ARIZONA AGAIN. THIS WAS 
ALSO THE SITE OF THE ORIGINAL CAMP THOMAS 
ESTABLISHED IN 1876 TO KEEP GERONIMO'S 
TRIBESMAN ON THEIR FARMLANDS 
ALONG THE GILA RIVER.
[...]"
The map pin is an approximate location. If you are traveling on US 70 you will find it somewhere between Bylas and Ft. Thomas on the north side of the road.
Photo by: Brian Seek
https://www.flickr.com/photos/squawkamole/