Marine 69-71, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons

Mule Pass.jpg

Mule Pass Tunnel

* on the Old Bisbee Tour and Copper City Territory Tour

Marine 69-71, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons