It's not the size that matters, it's what you do with it that counts, which is never more true than when sailing down the rivers of romance. Make a stop along your way at the tiny Art Nouveau heaven of Aveiro. An easy place to fall in love (or fall in love with), this seaside town is centred around a small network of canals dotted with gondolas, a relaxing cafe-culture and deciding on which candy-striped fantasy house you would like to live in one day. Aveiro has an air of Venice about it (minus the crowds), and is a mere bus ride away from strips of sandy beaches meeting the Atlantic.