ghosts do infact exist... and the veil is lifting, so it will become apparant to everyone once the veil in completely lifted. Many people have experiences with ghosts or otherwordly beings. Most are not violent, but kind and just lost. They don't realize that they are dead, and are confused as to why there is someone or something in "their" space. It has happenned on land with no house on it.
There is a property in Arlington, Texas that has been bought and sold too many times to count due to the fact that a very angry ghosts keeps scaring the workers and construction people. They buy the property, work on it a little, and then run away, sell the property, and the whole things starts over again.
This particular property used to have a house on it... they have taken the house down, several years ago, and have changed the property to commercial property, but the hauntings still happen.