The Zürich Card (24 SF) gets you 24 hours of travel in the greater Zürich area on all trams, buses, trains, boats (with a 5 SF supplement), cable cars, and cogwheel trains, plus free entry into over 40 museums. It's available from the tourist information center.
Zürich Tourist Service. Hauptbahnhof, Bahnhofpl., Kreis 1, Zürich, Zurich, 8001. 044/2154000; www.zuerich.com.