Duncan, AZ Hometown of Supreme Court Justice Sandra Day O'Connor. Bureau of Land Management (BLM) rockhounding area for fire agate. Prehistoric horses & turtles unearthed nearby. State Route 70 (Globe to New Mexico) A part of \"The Old West Highway\", U.S. Highway 70 runs 153 miles from Globe, Arizona to Lordsburg, New Mexico, tracing 600 years of western history and adventure. The road traverses sites of ancient ruins, traces of silver mining which once attracted the likes of Bat Masterson, Wyatt Earp & Doc Holliday, and outdoor opportunities for rockhounding, fishing, hunting, camping, hiking, biking, river floating and wildlife viewing.