Hi Stokesuk
yes your right about running water, waterfulls, the sea's ect are ment to enhance paranormal activity meny report of ghost ships, grey & white ladys of the lakes and lost souls at sea have been reported over the years.
Also if there has been a tragic event within a house hold this can trigger things
If building work has been done to a home or shop or pub ect this can bring sudden changes in the feeling of the place in turn setting free long lost and forgotten events from the building.
If there has been a accident or an unxpected event has happened this can also set off paranormal activity.....but this is not always the case.
I feel if the place in question has a lot of history behind it thing could well happen
Take the Moretons pub ever since the car crashed into it over xmas time it has strated a chain of paranormal events that GPS has been very lucky to be part of.