With its gondolas, canals, amazing restaurants, and unforgettable romantic ambiance, Venice is definitely a city for one's bucket list. Waterfront palazzos, palaces, and churches make drifting down the Grand Canal feel like cruising through a painting. To really experience Venice you must go to the opera or to a classical music performance, nibble fresh pasta and pastries, and linger in the exhibit halls of an art gallery. Label lovers will drool over the high-end shopping in Piazza San Marco.

With an enviable perch between the Adriatic Sea and Slovenia’s peaks, Trieste is an Italian city whose food, architecture, and history have Eastern soul. Add coastal castles to sun-soaked beach resorts, and you have one of Europe’s most cultured seaside getaways.

Over 15 million gallons of water bubble daily into Budapest's 118 springs and boreholes. The city of spas offers an astounding array of baths, from the sparkling Gellert Baths to the vast 1913 neo-baroque Szechenyi Spa to Rudas Spa, a dramatic 16th-century Turkish pool with original Ottoman architecture. The "Queen of the Danube" is also steeped in history, culture and natural beauty. Get your camera ready for the Roman ruins of the Aquincum Museum, Heroes' Square and Statue Park, and the 300-foot dome of St. Stephen's Basilica.

Dating from at least the 10th century, today Kassel is most famous internationally as the home of Documenta, an every-five-years exhibition of modern and contemporary art. In the late 17th century Kassel received a large influx of Huguenot refugees from France. During the 1800s, it became the capital of the Brothers Grimm's Fairy Tale Route. In 1943, the city was virtually razed by British bombers, leaving few old sights, but the 18th-century Wilhelmshöhe Castle overlooking the city remains.

Copenhagen is one of Europe’s oldest and most popular cities. It’s also one of the cleanest and most metropolitan. The dynamic Danish capital features progressive modern architecture, the must-visit Tivoli Gardens amusement park, stunning palaces, and all the activities and amenities you would expect in a world-class destination. Explore the canals and pretty narrow streets, appreciate beautiful old homes, and find great shopping and people watching on The Ströget.