Harrods is huge — 300 departments, a million square feet on seven floors — yet classy. Don't miss the Food Halls, Egyptian Escalator, and shrine to Princess Diana and Dodi Al-Fayed (his father was the store's former owner). At www.ricksteves.com, you'll find money-saving travel tips, small-group tours, guidebooks, TV shows, radio programs, podcasts, and more on this destination.