The Royal Mile is the name given to a succession of streets which constitutes the primary thoroughfare between the Edinburgh Castle and the Palace of Holyroodhouse in Old Town Edinburgh. Interestingly the length of the royal mile is about 1.81 km which is approximately one Scotts mile long; it is longer than the English mile but hasn’t been used for measurements since the 18th century. Geographically royal mile starts at the plug of an extinct volcano where the Edinburgh castle sits and goes downhill on a gentle crag and tail formation which was created when the glacial ice melted during the last ice age. The royal mile is made up of six distinct areas and their respective main streets. Starting at the top (west) the thoroughfare goes downhill where the streets Castlehill, Lawnmarket, High Street and Canongate form the royal mile in that order.