Royal Mile Avenue is the Central Avenue of Edinburgh's old city. It begins at Edinburgh Castle and ends at St. Cross Palace. The alleys on both sides are interlaced, forming the skeleton of the old city. Round stone paved ground has long been polished shing, the buildings along the main road are simple and magnificent, full of historical atmosphere. Every afternoon, street performers in Scottish skirts play bagpipes and remind visitors to stay in the old centre of Scotland. Royal Mile Avenue is divided into four sections. A small slope in front of the castle is called Castlehill, where the Scottish Whisky Cultural Heritage Center is located. The next section is called the Lawnmarket. The intersection across George IV Bridge Street began to be called High Street, and St. Giles Church was on the high street. Like most cities in Britain, High Street is the center of Edinburgh and the busiest commercial area. Finally, after the intersection of St. Mary Street, a section called the Canongate, pedestrians gradually sparse, surrounded by more medieval buildings, the end of the road is the Palace of the Saint Cross.