Porto vs. Lisbon: Which city wins travel rivalry? - By Paul Ames, CNN
(CNN) — Lisbon has established itself as Europe's hippest city-trip destination over the past couple of years, but now it has a rival that's a little too close for comfort. Portugal's second-city, Porto, is giving the capital a run for its money as the place to go for a unique blend of history, balmy weather, culture, cooking and nightlife. With its old riverside center designated as a UNESCO World Heritage Site, its chefs picking up a growing constellation of Michelin stars,
