Stretching from the high-on-a-hill Edinburgh Castle to the Holyroodhouse Palace, the Royal Mile is both Old Town Edinburgh's main thoroughfare and one of the city's main streets. Here you'll find top attraction after top attraction, including the Scotch Whisky Experience and Camera Obscura and World of Illusions, as well as a big concentration of shops, restaurants and pubs housed in stunning architecture along this cobblestone street. Most travelers note the Royal Mile's propensity toward tourist traps; they also say it's a must-do considering all its amenities. The Royal Mile is seen by many as the center of the city, so be prepared for crowds at all hours.