Did ancients know something that we have lost sight of with our desire to create a world of plastic and silicon?
With great pain and great strain, they ignored wood and trekked stones, often times not even varieties of the area, great distances to build monuments for spiritual practices. What was it about these stone buildings? Their very shape and design and building materials? Their location and alignment?
Is it possible that certain buildings are better "spirit vessels" for hauntings? Perhaps a combination of geology, orientation, building materials, leylines, waterways, and even room configuration or feng shui, might all come together to make some buildings with tragic pasts more likely to be haunted than others.
Upon occasion, a non-stone building can be haunted, but we tend to find those in mining communities where the ratio of hauntings is quite high and it's not because of a handful of trapped miners or a lot of gold town whores and shootings. If that were so, Harlem and Compton should be cities with a lot of hauntings given gang-related murders and great emotional upheaval.
What we concentrate too often on are those who haunt, but what we have been ignoring is what is in common about the physical features of these spirit vessels. There, we will not only be able to know which buildings are likely to be haunted, but know which buildings in the future might be at risk of hauntings. Now, that's knowledge in the field!