In the 1920s a prospector named Freddie Crystal rode into Kanab with a map he said traced Aztec treasure north after the conquest, and the whole town moved into Johnson Canyon and tunneled the sandstone for two years. They found ancient steps and sealed passages, and no gold. The legend has since attached itself to the drowned ledges of Three Lakes pond, where dive attempts still get talked about and permission never comes.
Johnson Canyon and Three Lakes, near Kanab (Kane County, UT)
See it on the map