Peter Davis and I, along with other Liberty colleagues Conor Cahill and Steve Anderson, spent the day wandering around ancient Pompeii.
One particularly interesting bit was the colliseum. At dinner afterwards, Peter and I were discussing how large we thought the Pompeii version was relative to its more famous Roman cousin.
Peter guessed that the actual 'playing field' was around 100m across. I said, 'No, that's too big, more like 70m'.
Google Earth helped determine the winner (modesty prevents me from explicitly calling it out)