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.

Katakolon, also known as Katakolo, is a charmingly small port and fishing town on the coast of Greece. A primary entryway to the nearby ancient ruins of Archaia Olympia, Katakolon is a popular stop on many Mediterranean cruises. Before heading to Olympia, be sure to unwind on the warm Grecian sands of Paralia Katakolo or savor a bite of fresh seafood at one of Katakolon’s quaint cafés.

Marrakesh, a vibrant jewel in the heart of Morocco, is a city where ancient traditions blend seamlessly with modern allure. Known as the "Red City" for its rose-hued buildings and walls, Marrakesh offers a sensory experience unlike any other. The city’s medina, a UNESCO World Heritage Site, is a labyrinth of narrow alleyways, bustling souks, and hidden courtyards.

Framed by an array of tropical flowers, "miniature" houses painted in a pastel palette will enchant you. But, a splash of watercolors is all you'll see as you zip by on a moped. It won't be long before you find the perfect spot for a beach picnic and afternoon of snorkeling.

Evidence of our nation's birth abounds in Boston, a hub of revolution that is essentially the oldest city in the United States. Visitors are compelled to walk the 2.5-mile Freedom Trail around the city center, and bear witness to 16 historical locations related to the history of America.