DragonCon is loosely contained within four neighboring hotels, with a constant flow of costumed humanity between them. The local constabulary was called in to regulate said flow.
Outside of the DragonCon art show, there was a golden column rising into the ceiling. Looking up, it continued through two more floors into a large atrium above.
In the dying moments of Origins 2008, I found a large floating pokemon thing in an otherwise deserted section of the convention center. Is it not haunting?