If you find yourself in Rotterdam, there's a strong chance you've arrived by water. This popular port city (the second largest in the Netherlands) has gone through an architectural renaissance since World War II, with daring, innovative structures dotting the city (cube houses!) and defining its skyline. Café culture is on the rise here, so grab yourself a table and a cup.

Long regarded as one of the freest-thinking college towns in the U.S., Ann Arbor is home to the University of Michigan, the Gerald R. Ford Presidential Library and Domino's Pizza. While you're in Ann Arbor, be certain to see the city's many fascinating historic buildings; the Kelsey Museum of Ancient and Medieval Archaeology; and Kerrytown (a diversity of specialty shops and eateries in restored 19th-century buildings close to the Farmers Market).

Akureyri, often referred to as the capital of North Iceland, offers travelers a distinct experience shaped by its Arctic location and rich local culture. Nestled at the base of Eyjafjörður fjord, the town has served as a trading center since the 1600s and continues to thrive with a mix of fishing, arts, and tourism. Within a few hours’ drive, visitors can reach the geothermal fields of Hverir, the volcanic craters at Lake Mývatn, and the powerful Goðafoss waterfall.

Bora Bora, often referred to as the "Jewel of the South Seas," is the epitome of tropical luxury. Nestled in the Society Islands of French Polynesia, this idyllic island is famed for its stunning turquoise lagoon, ringed by a barrier reef and dotted with overwater bungalows.

The skyline of Erfurt is shaped by dozens of churches, monasteries, and convents thrusting their pointed steeples upward to the sky. In the Middle Ages, Erfurt was known as "Thuringian Rome" because of its religious orders. The impressive twin churches on the Domberg (Cathedral Hill), the Roman Catholic St. Mary's Cathedral (14th century) and the Roman Catholic Parish church St. Severus with a flight of 70 outdoor steps leading from the Cathedral Square up the hill to the churches.