Sintra is the best day trip: 40 minutes by train from Rossio

In Sintra, aim for two palaces and book Pena for a set time

Cascais and Cabo da Roca: the easiest coast day, 40 min by train

Évora, about 1 h 30 by train: a Roman temple and the Alentejo

Óbidos: a walled medieval town, about an hour by bus

Setúbal and Arrábida: beaches, seafood and dolphins, about 1 hour

One trip per day, as most do not combine; all seven in the guide