A wonderful piece of history. We did the tour and it is very much worth it. I recommend it to people of all ages, and to people who may not be all that \"interested in history\" because I am one of those people and I enjoyed myself immensely. \n\nThey fire a cannon at 1 pm daily (One o clock Gun), but we came a little afterwards. Wear comfortable shoes because the cobblestones, plus the random spurts of rain, can make things slick. My favorite parts of the tour:\n\n- seeing the Queen's exhibit with the Scottish military history\n- seeing the Crown Jewels\n- looking out over the city from the castle walls. \n\nWorth a visit!! Allocate at least two-three hours, we walked through everything in a little more than two.