Once a powerful kingdom that dominated the world sea routes, Portugal today is one of the friendliest and most peaceful countries in Europe, though the legacy of its former wealth can still be found in its historic cities. Starting from the colourful Porto, the country's second city and a UNESCO site, our journey follows the verdant valleys and rolling hills of the Douro wine region, before heading to the lesser known interior, where we visit Coimbra, the UNESCO Batalha monastery, mediaeval Obidos and magnificent Sintra before reaching Lisbon, one of the world's most enchanting capital cities.