The City Circle Tram is a free service that runs around the Melbourne CBD
An audio commentary provides details of city landmarks and major attractions such as the City Museum, Parliament House, Docklands, Federation Square, Melbourne Aquarium and the Princess Theatre.
and a free map is available on board

This is a very popular route with locals as well as tourists

Trams run approximately every twelve minutes between 10am and 6pm Sunday to Wednesday and extended hours, 10am - 9pm Thursday, Friday and Saturday.