Edinburgh Castle is an ancient stronghold on the Castle Rock in the centre of the city of Edinburgh, has been in use by assorted military forces since 900 BC and only transferred from Ministry of Defence administration recently. It lies at the top of the Royal Mile, the principal street of the Old Town which leads down to Holyrood Palace.Additionally, The castle is situated atop The Castle Rock, a volcanic crag. Three sides are protected by sheer cliffs and access to the castle was limited to a steep road on the fourth (eastern) side, which attrive visitors and people( who living here)'s view.