Okay, we have not been able to scientifically prove their existence, but we can all agree that they tend to frighten and even terrorize people and they always appear when you least expect them. From Shakespeare’s Hamlet or Dicken’s Christmas Tale to the Blair Witch Project, literature first and then cinema, it seems that there are quite a few people wanting to prove scientists wrong. Undoubtedly, Casper or Moaning Myrtle in Harry Potter are the favorites of children. The older prefer to see other kind of ghosts such as Abraham Lincoln, Elvis Presley, Anne Boleyn, The Phantom of the Opera or Bloody Mary, among others. The downside is that you never know exactly when or where to expect them. If you want to get to know them, you only have to visit places where to find the most famous ghosts in the world. Do you dare to wait for them?