In October 1947, legend has it that a UFO crashed in North Phoenix. Many believe it crashed at what is now the site of the Dreamy Draw Dam and that the dam was built to cover up the crash.
That's not true, as the dam wasn't built until 1973, but believers have a different theory on what might've happened:
The Cave Creek version of the legend says that the UFO initially crashed a little to the south of where Carefree Highway is now. Considering that the location was relatively rural at the time, the government had plenty of time to come up with a cover-up, so they decided to place the Cave Creek landfill over the site of the crash.
Allegedly, large groups of government officials could be found in Cave Creek's hotels and restaurants toward the end of the 1940s, including groups driving along Carefree Highway to and from the landfill.
One possible combination of the two crash-site options is that some of the debris from the crashed spaceship was moved and buried under the Dreamy Draw Dam after more people began moving to Cave Creek in the 1970s, making it a less desirable place for the government to hide an alien spacecraft.
The landfill is now closed, and a recycling center servicing both Cave Creek and Carefree is located at the same site, but the landfill certainly had its fair share of questionable issues during its run. Reports of toxicity, water contamination, and radiation coming from the landfill for years surrounding its closing, and though many attribute these issues to normal trash buildup, those who believe in the crash say that the landfill closed after it was found to have been contaminated by fluids leaking from the wreckage approximately six decades after the initial impact.
While no one has proof that a UFO ever crashed in Cave Creek, it's never been debunked like its Dreamy Draw counterpart. That's good enough to be seen as a part of the area's history by most lifelong residents.