See bottom of article for info on passes.

Lisbon has 4 main public transportations: Bus (run by Carris, also includes trams, funiculars and the Santa Justa Elevator), Metro, Train and Boat.

Buses, Trams & Funiculars

Carris was founded in 1872 and their trams became one of the main symbols of the city. They were the main mean of transportation until the 1960's when the Bus and Metro networks started the trams' slow decadence.

Today there is an extensive network of buses, trams and funiculars in Lisbon, and they are all worth a ride on, especially the vintage trams, and the funiculars. They are an attraction in themselves.

Despite the foreigner common knowledge of Lisbon being a "city of trams", there is only about 1/6 of the former route lines and the total network is four times smaller. The remaining routes connects the hills of southern Lisbon and the nº 15 tram covers entirely the Lisbon's Tagus southern margin from downtown to the city's most southern-west point.

Carris network is relative stable since the latest renovation of fleet and routes between 2005 and 2008. The bus network covers the entire city and also serves certain areas outside the city and located in other Municipalities, like Cruz Quebrada, Linda-a-Velha, Alfragide, Odivelas and Prior Velho, among a few others.

There is a very good unofficial map of the five remaining tram routes at  http://www.urbanrail.net/eu/pt/lisboa...  

Here is the official and up-to-date map on the Carris website.

 Also look at individual bus lines (which includes the trams) for the stops along the line. Carris' network map is more oriented to Lisboans than visitors but can be useful if also looking at a good city map.

 See the article on Tram 28 in the "Things to Do" attractions section. It is a very popular way to see the old district on the hill where Castelo do Sao Jorge is located.

 Metro  

Lisbon's Metro was inaugurated in 1959 and the network has more than doubled their size in the last 15 years but still has much to grow to cover the entire city.

Is the quickest way to travel to some areas and there are 4 lines.

Head for Baixa-Chiado or Restauradores stations for the old and historical parts of the city centre. There is also interesting architecture and tilework in the stations, so is an attraction in itself. Beware however of pickpockets. Written and audio warnings in both Portuguese and English can be found in most stations but this will not protect you of theft attempts. More information about the rapidly changing and expanding network can be found on the Metropolitano de Lisboa website. This is a useful website as you will be able to obtain more detailed maps around each station with bus and tram routes included. A day pass costing 4.60 Euros can be obtained from the stations and will allow travel on the cities' buses, trams, funiculars and metro for 24 hours. Note that the ticekt costs an extra 50 cents but can recharged - don't throw it away!

 Train

Lisbon has several train stations and a network that serves national, regional, suburban and urban areas. Check CP official site

for more information and to purchase tickets.

Boat

 Because of its location along the river Tagus, Lisbon has three fluvial stations (also serving the Bus and Metro networks) connecting the city to other places located in the southern margin of the river, like Cacilhas, Seixal and Montijo among others. The "Cacilheiro" is another symbolical mean of transportation of Lisbon's Metropolitan area.

 You can check out schedules, ticket prices on the Transtejo-Soflusa official website (There's still no English version but all that information is under "Horário e Tarifário" option).

 Fares and Passes

Flat fare on the buses is €1,80 - cash paid on board. Flat fare on the trams (streetcars) is now 2,85 Euros with the object being to make more users buy pre-pay passes.

There are a variety of passes available which reduce those costs considerably. Details are available in English on the Carris website as above. (Unfortunately the Carris website is difficult to navigate and is lacking in information.)

The "best deal" for a visitor is to buy the Viva Viagem unlimited pass for as many days as required. The cost is 5.50 euros for the first day, and 5.00 euros for each additional day. It is good for all buses, trams and Metro. It allows unlimited use throughout the city. It can be purchased at any Metro station and in some post office branches. It is best to see the attendant in the booth rather than try to use the automated ticket vending machines as they are confusing and apparently do not take all credit cards. Do note that buying at the booth requires cash.