Think you need a car to visit Portugal? The map below shows many of the places you can get to on public transportation in Portugal. The best places to visit are shown in red. Orange dots indicate fast trains go to that station. The green dots are for intercity and local trains, and urban and suburban trains are shown with black dots. Many more locations are accessible by bus in Portugal.
There should be a Portugal Transportation map here. Use the controls on the lower left to enlarge the map. You can also drag it with your mouse once you’ve zoomed in a little. Have fun.