Edinburgh’s Royal Mile is the heart of Scotland’s historic capital. A short walk away is the Grassmarket, an area steeped in the city’s colourful history. The Royal Mile runs through the heart of Edinburgh’s Old Town, connecting the magnificent Edinburgh Castle, perched high on a base of volcanic rock, with the splendorous Palace of Holyroodhouse, resting in the shadow of Arthur’s Seat. The Mile is overlooked by impressive, towering tenements, between which cobbled closes and narrow stairways interlock to create a secret underground world.