Budget London Tips: Tour for $15 a Day

London is rumored to be one of the most expensive cities in the world, thanks in large part to an exchange rate that is not in Americans' favor. But I think the rumors are mostly exaggerated. Money is no reason to deny yourself the opportunity to see one of the world's finest capitals. If you can afford Chicago or Disney World, you can save money in London by sticking to my insider's budget travel tips.