Ilok, the easternmost town in Croatia on the Danube River, may be small but it has a lot to offer. A well-preserved Franciscan monastery and a 15th century castle make it a popular day trip for domestic as well as foreign tourists. Its wine-making tradition is even older; some say the region's viniculture dates back as early as 280 AD.

There's plenty to explore in this vibrant Caribbean paradise. Visit one of the island's many beaches, including Bachelor's Beach, Te Amo Beach, and Sorobon Beach, take a stroll through the Bonaire Arts and Crafts Market, or visit Washington-Slagbaai National Park, where you'll likely catch a glimpse of many of the island's native birds and reptiles.

Manzanillo, located on Mexico’s Pacific coast, is a port city known for its beautiful beaches, excellent seafood, and world-class fishing. It is one of the country’s busiest ports, and is often called the "Sailfish Capital of the World."

Seven miles outside of historic Athens, the Greek coastal city of Piraeus lies upon the sparkling waters of the Aegean Sea and is the largest passenger port in Europe, servicing nearly 20 million passengers per year.

One of the major rivers of the Iberian Peninsula, the Douro in north-central Spain and Portugal just might be the world's most beautiful wine region. Most of the river on the Spanish side isn't navigable, so river cruises generally travel roundtrip from Porto, on the coast of the Atlantic.