You won't find many people who've actually been to Missouri's Lemp Mansion that don't believe there's something strange present there. Now, there's proof. An investigator has captured video of an apparition that's hard to explain without using the word "ghost".
There are few buildings in Missouri with a more twisted history than the Lemp Mansion in St. Louis. According to multiple investigations over the decades, there is a belief that it is haunted by at least 9 ghosts.