I went to Edinburgh when they did their Tattoo / Fringe / International festival a few years ago. It was one of the most fun I have ever had traveling. The energy of the crowds, the street fairs and food were amazing and then going to see tons of live comedy and / or shows was amazing. I want to go again and just try to see as many shows as possible especially some of the smaller ones. I might even be interested in going to see the Tattoo.