We got to see Edinburgh Castle as well as taking a trip down the "Royal Mile." The Royal Mile is where lots of the city's historical events took place. One highlight was getting a picture at Adam Smith's grave, the father of modern Economics. (You know the supply/demand concept? He's the one who first presented the idea formally in his book The Wealth of Nations.)
On the trip, I also discovered the brilliance of scarves. I got a Scottish made lambs wool scarf and found that it keeps one quite warm by cutting the wind and providing general toastiness.
Edinburgh Castle Canon (interestingly, it's never been used. There is a modern canon fired from the castle daily at 1 pm to give the ships in the harbor a signal to set their clocks by.)
More pictures posted here.