The town that gave the country (and port wine) its very name, Porto is Portugal’s second-largest metropolis after Lisbon. Sometimes called Oporto, it's an age-old city that has one foot firmly in the industrial present. The old town, centered at Ribeira, was built on the hills overlooking the Douro River, and today is a UNESCO World Heritage Site. The 14th-century São Francisco church is a main attraction, as are the local port wine cellars, mostly located across the river at Vila Nova de Gaia.

A self-guided walking tour is the best way to appreciate the stunning architecture of Viana do Castelo. The buildings date from several different centuries so styles vary: highlights include the early 20th-century Basilica of Santa Luzia; the 16th-century fountain and former city hall building at the Praça da República; the gothic Cathedral on the Largo da Matriz; and the Monument to Caramuru and Paraguaçu, built just a few years ago in 2009.

Brimming with both history and natural wonder, Northern Portugal is home to Porto, the city that gave the country its name, as well as the important ancient town of Braga. Also here is Peneda-Gerês, Portugal’s only national park, a gorgeous wilderness area of mountains, gorges, water features and wildlife. Many picturesque villages and manor houses dot the countryside. Two areas are UNESCO World Heritage Sites: the Alto Douro Wine Region, and the Paleolithic rock art in the Côa Valley.

Quebec City may be the only fortified city north of Mexico, but it welcomes visitors with open arms. Explore the Citadel, where you might catch Canadian troops staging a military ceremony. As for food, you could splurge on afternoon tea at the Chateau Frontenac, or do as the locals do and snack on poutine—french fries with gravy and cheese curds.

Montreal, c’est si bon! This French-speaking city is considered the cultural capital of Canada, and is a cosmopolitan celebration of Québécois style. A horse-drawn carriage ride around the cobblestone streets and grand buildings of Vieux-Montréal will give you a taste of European flavour. The Basilique Notre-Dame is a confection of stained glass, and the Plateau Mont-Royal district will delight you with its quaint boutiques and cafés. Dig in to a massive plate of poutine to fuel up for a tour of the epic Olympic Park.

We won't lie: Niagara Falls is uber-touristy. There are wax museums and a Ripley's Believe It or Not Museum, and if it's a fast-food chain, you can probably find it here. But even the most jaded hipster shouldn't pass up a chance to visit this town, because the Falls themselves are spectacular.

We've heard Toronto described as "New York City run by the Swiss," and it's true—you can find world-class theatre, shopping and restaurants here, but the sidewalks are clean and the people are friendly. The best place to start is literally at the top—the CN Tower, the tallest freestanding structure in the Western Hemisphere.

As North America’s northernmost large metropolis, Edmonton is a fascinating study in contrasts — a vibrant urban centre in the heart of the wilderness. It’s a city that’s never been afraid to do things a little differently, as visitors discover through close encounters with free-roaming bison, a shopping mall that spans more than 48 city blocks, and a dynamic arts and culture scene that embraces more than 40 annual festivals, including the continent’s biggest and wildest Fringe Theatre Festival.