re: Going to Paris and London-need help

I definitely say stay longer in Paris. We did 5 days in Paris and 2 days in London. Definitely use the metro in Paris to get around. Buy the all day pass. There are little sub stations near all the good spots: Louve, Note Dame, Effiel tower,etc. As mentioned take the Euro train from Paris to London. Go at off times such as 10 am and save a bunch of money and avoid the business travelers in the early am. We took the double decker bus tours right out the train station out of London. The buses run ever 15 mins to tourist spots such as Big Ben, Buckingham Palace, etc. Have fun and be safe