Shuffling through Europe's most crowded palace on one of the most crowded days of the year (Sunday in mid-summer) I was struck by the cameras, groups, iPads, humidity, and exhaustion on peoples' faces. In spite of the crush, you can feel the gasps of excitement when the long train of royal staterooms reaches the Hall of Mirrors. I was moved to struggle upstream. This video clip shares an experience I'll never forget. What is your worst crowd experience at a great sight in Europe? Subscribe at http://goo.gl/8iBEnS for regular blog updates from Europe.