There’s a little town full of all kinds of exploration called Bisbee, AZ. Visit the Bisbee Mining and Historical Museum ( a Smithsonian Affilliate) and see 1880’s electricity and copper ore and take the Queen Mine tour.
Explore the OK Corral where Wyatt Earp, Doc Holliday, Virgil and Morgan Earp fought the Clantons and McLaurys on October 26, 1881. It is really hot – be sure to bring lots of drinking water! Kids had a great time.