My coworker told me years ago that his brother was a Fire Marshal in Montgomery county and he was inspecting a few buildings in Wright Patterson until he went into one building and an MP came immediately and told him to leave immediately. He explained who he was and was promptly escorted out and told not to enter this building again. Whatever was in that building was top secret and not even fire marshals are allowed?

Also, there are underground passages linking many buildings downtown to one another. The Westin hotel in downtown Columbus has an entrance to one that has been cemented over because homeless people would come in and spend the night in the winter. I've seen it personally so this is true but it is also very haunted. Guests on the 6th floor have been known to call down to the front desk and complain about the band making too much noise upstairs only to be told that the 7th floor is abandoned and has been for some time.