I’m a huge fan of Europe’s FREE WALKING TOURS, and in Granada, Spain,
I found one of the best companies that do this.
The last time I was in London, I barely got on the Tube at all. I walked the entirety of downtown London, seeing all of the sights, and everything in between. This map is a great idea.
The full-sized version is here. It shows that people who catch the Tube from Covent Garden to Leicester Square and Mansion House to Cannon Street (or vice versa) are wasting both time and money, as the journey takes less than five minutes on foot. On the other hand, the walk between Euston and South Hampstead takes a whopping 53 minutes, despite the stations being directly linked.