As squares go north of the Charles river, Harvard Square is the daddy of them all. This is where the tourists come in their droves. Adjacent to the historic brick walls of Harvard University, "The Square" is world famous for its eclectic collection of small boutiques offering everything from haute couture to the latest in street fashions. Music and entertainment are everywhere, and you can browse in the world's largest concentration of bookstores. Street performers greet you at every corner offering songs, dramatic performances, juggling and magic.