The official language is Portuguese, but many persons in larger cities and at resorts speak English. The roads are winding and surfaces are unpredictable, so drive carefully. Driving is on the right. Parking at the side of city streets is limited. Parking in the country is unlimited but on narrow roads, it is wise to draw in as much as possible and avoid curves.
Gas prices are among the highest in Europe.
The unit of currency in Portugal is the escudo, which can be divided into 100 centavos. The exception is American Express travelers checks, which can be exchanged commission-free with Amex agents. Keeping a small cash stash in US dollars is a very good idea. In Lisbon, the post office in the Restauradores is open 24 hours. For a snack, a bit of loose change is enough.