Known for walkable urban villages like Crystal City, Rosslyn and Ballston, Arlington was part of the "10 miles square" surveyed in 1791 to be the United States capital. Just across the Potomac from Washington, Arlington is home to the Pentagon, Arlington National Cemetery, the Marine Corps War Memorial (Iwo Jima), Air Force Memorial and Pentagon Memorial. With 11 Metro stops, Arlington is car-optional and offers visitors everything from eclectic theater to Bohemian cafes.

A short Metro ride from Washington DC, Alexandria, Virginia is the perfect escape from the fast-paced capital. First settled in 1695, the city retains its colonial spirit, with cobblestone streets and historic buildings in the Old Town, Gadsby's Tavern, a restaurant serving food since 1770, and centers of learning like the Black History Museum. For a more contemporary side of Alexandria, wander the streets of the stylish Del Ray neighborhood, where local artists operate boutiques and studios.

Billing itself as "The Factory Tour Capital of the World," York, Pennsylvania, is the home of thirteen different factories open to the general public. Find out how everything from potato chips to motorcycles are made! The York Barbell Factory includes the USA Weightlifting Hall of Fame, where visitors can see such sights as a license plate torn in half using only bare hands.

Though famously home to Duke University, Durham, North Carolina, is more than just a college town. Nasher Museum of Art and the Museum of Life and Science show off Durham’s cultural side, while pretty parks and a dynamic dining scene add to its appeal.

Visitors who come to Ibiza’s energetic capital for its nightlife are treated to more than just thumping ultraclubs and celebrity sightings. By day, the harbor town is a sun-drenched sampler of Spanish-island style, with waterfront cafes, urban beaches, trendy boutiques, and even a UNESCO-listed fortress.

Coveted by empires and republics throughout its history, Innsbruck was the seat of the imperial court of Maximilian I by the end of the 15th century. Trams make getting around the city quick, efficient and cheap. Explore the Tyrolean capital's history at Archduke Ferdinand II's 10th-century Schloss Ambras, the Tyrolean Folk Art Museum, the grand 15th-century Imperial Palace and Maximilian I's famous Golden Roof. One of Europe's most idyllic cities, Innsbruck is nestled in the heart of the Alps.