In 1900, cries of "There be gold in them hills!" could be heard ringing through the streets of downtown Phoenix. But these miners were not referring to the Superstitions and legends of lost Dutchmen. These were claims for mining rights on South Mountain. Today, most of the mines have been filled and covered, but several holes are still visible and accessible (though, for the record, we do not recommend you try to access them). The primary mine on the mountain was the Max Delta in the San Juan Valley, and it still can be seen from San Juan Road. Some clever online research can uncover hikes to a couple other mine entrances that have remained intact since Phoenix incorporated the park in 1924. Good luck!