Whatever was going on with alien technology in 1947 must have resulted in galaxy-wide vehicular recalls. That year, UFOs were crashing all over the damn place, most famously in Roswell, New Mexico — giving birth to one of the most famous conspiracy theories in U.S. history — but also here in Phoenix. In his 1950 book, Behind the Flying Saucers, UFOlogist Frank Scully (no relation, it seems, to Dana) alleges an extraterrestrial craft crashed at the Dreamy Draw Recreational Area near Piestawa Peak, and that two alien bodies were yanked from the wreckage. Theorists suggest the Dreamy Draw Dam was built to cover up evidence of the ship and while that's, you know, not true — the dam wasn't built until 1973 — it's fun to wander the placid desert landscape there and speculate that there's something otherworldly behind the mysterious hum that can be heard near the structure.