I'm not enthusiastic about organized trips that require early morning wake-up times, dictate your every move, and keep you captive on a bus for hours every day, but I do love tours that give an overview of the city. And the very best tours for a Tightwad Traveler, of course, are the free variety.
You can find a free tour for almost any city you visit, and the good people at the Price of Travel have published a handy list: list of free tours
David and I have taken several of these tours; here is a description of the first one we took in Paris in 2009.
|Fountain in the Place St. Michel, the gathering spot for the tour.|