Picking up a car rental in Porto Airport allows you to travel at your own pace through Portugal.
Driving a car rental in Porto is no harder than driving in any other major European city. During rush hour congestions are a possibility and parking tends to be scarce and paid, but there are several convenient car parks in the city where you can leave your car rental in Porto.
You will often come across homeless people helping drivers find a spot for their cars. Even if they weren't particularly helpful when parking your car rental in Porto, handing them a coin will prevent them scratching your vehicle while you're away.
Drive your car rental to Lisbon along the coast and stop off at one of the coastal resorts along the way to soak up the sun.