Tombstone became famous because a prospector ignored a warning that basically told him he was going to die. In 1877, Ed Schieffelin was searching for silver near Camp Huachuca when he was reportedly told the only stone he’d find out there would be his own tombstone. He found silver instead, named the claim Tombstone, and helped kick off one of Arizona’s wildest boomtowns. Within a few years, thousands of people had flooded in chasing money. The town became packed with saloons, gambling halls, miners, hustlers and gunmen. Then came the moment that turned Tombstone into a legend. In 1881, lawmen Wyatt Earp, his brothers and Doc Holliday faced off against a group of local cowboys in a shootout that lasted about 30 seconds and left three men dead. That became known as the Gunfight at the O.K. Corral, even though it actually happened in a vacant lot nearby. Tombstone survived two massive fires, but what nearly finished it was something way less dramatic: water. The silver mines floo...