What is the best way to experience the city of Cambridge, Massachusetts? You could read a history of Harvard University, take a walking tour, or perhaps browse a topical website. But why not look at the Cambridge CityViewer for edification? This unique tool "allows the public to view, query, mark up, and print custom maps using only a web browser." Notedly, the viewer works best with Internet Explorer or Mozilla Firefox. Visitors can check out ten different topical overlays, including those dealing with city parks, construction projects, land parcels, sewers, zoning, and traffic. There are many ways to get started, such as performing a simple search, an advanced search, or even just by typing in a street name and number. For anyone with an interest in urban history, planning, and land use, this site is a rare treat.