There are several different routes you can take through the castle depending on how much time you want to spend there. The hour-long itinerary takes you through Portcullis Gate, up the Lang Stairs, and into St Margaret’s Chapel, the oldest part of the castle. After that, you’ll head up to the battlements to see Mons Meg, a 6-ton siege gun which could fire shots within a range of 2 miles. From the battlements, you’ll also have time to enjoy a stunning view of Edinburgh before heading to see the Honours of Scotland (the Scottish Crown Jewels) and the Stone of Destiny, also known as the Scone of Stone. After visiting the treasures, you can stop off in the Great Hall, which was built in 1511 and houses an exhibition of weaponry, before visiting the Prisons of War Exhibition in the room below the Great Hall. Finally, you can learn about the One O’Clock Gun in a special exhibition, or time your visit so that you’re in the grounds when the gun goes off. Longer routes include a visit to the Argyle Tower, the Military Prison, the Royal Scots Museum, the Royal Scots Dragoon Guards Museum, the New Barracks, the Governor’s House (exterior only), the National War Museum, and all the different sets of defenses.