The Lisboa Card sold by the Tourist Office gives free access to 16 museums, nine palaces, miscellaneous monuments, plus unlimited use of the Metro and trams. It also provides reduced entry to a number of other museums and sights. On Foot Lisbon's hills give walkers a good workout. Walking is the best way to see the city. The city is difficult to navigate and it's nearly impossible to find a legal parking space.
Public transport is easy to use and is the best way to get around.
However, if you need one, there are cabstands all around the city. It is much easier to get a cab at a stand than to try to flag one down. Fly Aeroporto de Lisboa, Portugal's international airport, lies on the north edge of the city, within sight of the Ponte Vasco da Gama. The metro is inexpensive and easy to use. It covers Avenida Liberdade and the business districts.