Brea Canyon Road in Diamond Bar is described as a haunted location where people report seeing a ghostly boy with a dog's body, disembodied voices and noises when driving with the windows down, and spirits that appear to morph from one person into another. These paranormal experiences are attributed to the area's alleged past, though specific historical details about the hauntings are not provided in the given snippets. A local resident claims to have witnessed spirits that change from one person to another. The same resident also reported seeing a ghost with a boy's face and a dog's body. Drivers have reported hearing strange sounds, particularly when their car windows are down.