I’ve never rented a car in Europe. It’s expensive and intimidating, and I love riding trains between towns and walking within a city anyway. In Portugal, I got a tour of the Douro Valley by hiring a car and driver for a day. But some classic European trips that demand a car are calling to me – the Croatian coast, the Irish countryside, Italy’s Amalfi Coast – so I’ve started doing research. I found a good starting point in this column by Rick Steves.