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.

Padang is the third largest city and the capital of West Sumatra. It is the biggest seaport along its west coast, and is a center of business and government. The terrain of the city is mostly flat, and the name Padang actually means "plain." But if you venture outside of the city limits, the scenery is quite lovely going towards the neighboring city of Solok.

Chau Doc is a riverside city in Vietnam’s An Giang Province, close to the border with Cambodia and the waterways of the Mekong Delta. The city is known for its floating fish farms, canal networks, and active river trade that connects nearby rural communities.

Located just off the southern coast of France, Monte Carlo beckons you with glittering pebble beaches, old-world charm, and stunning architecture.

Leiden or Leyden, city in the western Netherlands, in Zuid-Holland (South Holland) Province, on the Old Rhine River, near The Hague. Leiden is also the site of the State University of Leiden, one of the oldest and most distinguished universities in Europe. It was the birthplace of several important Dutch painters, including Rembrandt, Jan van Goyen, and Jan Steen. During the 17th century the English settlers who became known as the Pilgrims took refuge in Leiden before leaving for North America.