Take a leader-led orientation walk with your group this morning to get your bearings. One of the best ways to get to know Porto is through its port wine, so you’ll get a chance to test out Portugal’s famed wine on an included wine tasting. Otherwise, the day is free to do as you please. The city's World Heritage-listed Ribeira district is packed with twisting alleys, staircases and baroque churches, and is great to explore on foot. Make sure you also visit Mercado do Bolhao, Porto's market, one of the city's institutions since 1914. For a sensational view of the whole town head to the Torre dos Clerigos (Clerigos Tower), or head down Allies Avenue to see the French-inspired buildings. Oh, and in the evening, why not book yourself on a Rio Duoro cruise on one of the historic 'rabelo' boats to see the city from the water.