Nestled at the foot of the Black Forest in South Germany, Baden-Baden is a chic destination for those who fancy a dip in its famous salt- and radon-rich thermal hot springs. The town has been a popular destination for so long that it's starting to show its age, but not to worry. It's still very classy, picturesque and well-maintained. (The Dame Julie Andrews of German spa towns, if you will.) Sporty types will find an abundance of opportunities to enjoy golf, tennis, horseback riding and skiing nearby in winter.

Founded in the mid-9th century, Ulm enjoyed a long history as a free imperial city, ruled only by the Holy Roman Emperor with no pesky princes in between. An important trade town for centuries, Ulm was also the birthplace of Albert Einstein. Rising 530 feet, Ulm Minster has the world’s tallest steeple, the top of which can be reached via 768 steps. Ulm’s younger sister city, Neo Ulm (or New Ulm) lies just across the Danube River and is part of Bavaria rather than Baden-Wurttemberg.

Home to the oldest university in Germany, Heidelberg was hit hard during 17th-century wars and rebuilt in the 18th century with baroque buildings. For a pleasant walk, stroll through the historic city centre's Gothic streets. Be sure to take in Heidelberg Castle, the symbolic heart of the city; Alte Brucke, a beautiful 18th-century bridge; and the Student Jail. Built as long ago as the 16th century, it was used to keep mischievous students off the streets for three days to a month at a time. And they say Penn State is the number-one party school!

Baden-Wurttemberg’s second-largest city after Stuttgart, Mannheim lies at the confluence of the Rhine and Neckar Rivers and is rare among German cities for its layout, a grid pattern (or “quadrates”) similar to those found in North America. The grid was originally plotted in 1606 and emanated from Friedrichsburg fortress, which later became the site of Mannheim Palace. Today, it partly houses the University of Mannheim. The city’s iconic water tower and its beautiful Luisenpark are must-sees.

Walk atop Rothenburg’s city walls or climb to the top of the town hall for great views. The Night Watchman tour is an unforgettable way to learn the city’s history. And our travelers also recommend the Medieval Crime Museum (Mittelalterliches Kriminalmuseum)—it’s gruesome but fascinating.

Romantic Naples, two hours south of Rome, is the largest city in southern Italy. It has some of the world's best opera and theatre houses and is often called an open-air museum, due to its many historic statues and monuments. Join families on the promenade as the sun sets on the Bay of Naples. View finds from Pompeii and Herculaneum, destroyed by Mount Vesuvius in 79 A.D., at the Museo Archeologico Nazionale or revel in the art and architecture of Museo Cappella Sansevero, built in the late 1500s.

Sinaia is famous for its natural beauty and the rumored medicinal properties of its mineral springs. Known as “the Carpathian Pearl,” it’s a lovely mountain town whose main attractions are castles, alpine activities like hiking and skiing, and a 17th-century monastery that is still inhabited today.

Dubai is a destination that mixes modern culture with history, adventure with world-class shopping and entertainment. Catch a show at the Dubai Opera, see downtown from atop the Burj Khalifa and spend an afternoon along Dubai Creek exploring the gold, textile and spice souks. If you’re looking for thrills, you can float above the desert dunes in a hot air balloon, climb aboard a high-speed ride at IMG Worlds of Adventure or skydive over the Palm Jumeirah.

This former British colonial stronghold boasts evidence of over two millennia of habitation, with ornate, architecturally diverse buildings, ranging from crumbing ruins to Victorian treasures. Home to lively festivals and a vibrant artistic community, clamorous markets and packed temples, this city is crowded and polluted, but ultimately invigorating.