Home to Windsor Castle, the second residence of Queen Elizabeth II, Windsor is a popular day-trip destination from London. Those who tarry in the riverside town fill their time wandering the cobbled streets, popping in and out of the luxe boutiques, restaurants, and tea shops that tumble down toward the Thames River.

Just west of London, Reading offers redbrick Victorian buildings, medieval ruins, a thriving university, and pretty waterside walks along the Thames River. Its student community and annual rock-music blowout—the Reading Festival—add an offbeat edge.

In the "city of dreaming spires," academia takes center stage. Gaze out at Oxford's world-famous university from the top of Carfax Tower before heading into the city's pedestrian-friendly streets. Follow your nose to the Covered Market for the makings of a picnic to enjoy at Headington Hill Park. Mix the historic and modern with visits to the 12th-century village church of Iffley and trendy Cowley's ethnic shops and music venues.

Boasting a historical dockyard housing Henry VIII’s Mary Rose and Lord Nelson’s HMS Victory, Portsmouth has maritime heritage written all over it. Museums aside, the city still lives and breathes the sea—best exemplified in its nautical spirit, cobbled historic district, and sail-shaped Spinnaker Tower viewpoint.

Southwest of London is Southampton (Soton to the locals), a metropolitan area centered around the port. However, tucked away on the side streets are ancient gems such as the Tudor House, Mottisfont Abbey, and "God's House," a museum located in a tower in the medieval wall. The ultra-modern Sea City Museum celebrates Southampton's seafaring past and the RMS Titanic. Looking for nightlife? Travelers can dance the hours away with bars, clubs, and live music, all accessible by public transportation.

Lingering over pain au chocolat in a sidewalk café, relaxing after a day of strolling along the Seine and marveling at icons like the Eiffel Tower and the Arc de Triomphe… the perfect Paris experience combines leisure and liveliness with enough time to savor both an exquisite meal and exhibits at the Louvre. Awaken your spirit at Notre Dame, bargain hunt at the Marché aux Puces de Montreuil or for goodies at the Marché Biologique Raspail, then cap it all off with a risqué show at the Moulin Rouge.

This city, full of colorful homes, canals and bridges, is one of Europe's most picturesque capitals. Must-sees on any visitor's itinerary include the Anne Frank House, the Van Gogh Museum and the world's only floating flower market. Rent a bike and join thousands of locals navigating Amsterdam's labyrinthine streets, or just take in the sights on foot. For an unusual and memorable alternative to hotels, consider staying in a houseboat.

Munich exudes Bavarian charm. Beer fanatics should head immediately to the Hofbräuhaus, a hops heaven that’s been churning out the good stuff since 1589. The drinking is downright legendary during Oktoberfest, a celebration of local beers and German specialty foods. Emulate world-class athletes at the Olympiapark, where skating on the Olympic ice rink will make you feel like a champion. The promenade of Marienplatz is perfect for people watching and gawking at the Glockenspiele of City Hall.

Barcelona feels a bit surreal – appropriate, since Salvador Dali spent time here and Spanish Catalan architect Antoni Gaudí designed several of the city’s buildings. Stepping into Gaudí’s Church of the Sacred Family is a bit like falling through the looking glass - a journey that you can continue with a visit to Park Güell. Sip sangria at a sidewalk café in Las Ramblas while watching flamboyant street performers, then create your own moveable feast by floating from tapas bar to tapas bar.

So many of Madrid’s buildings look like castles, you’ll think you’ve stumbled into a fairytale. Even City Hall is astounding, with its white pinnacles and neo-Gothic features. A self-guided architecture tour can begin by the great bear statue in the central Puerta del Sol. Wander by the fanciful Royal Palace before absorbing the natural beauty of Retiro Park, then visit one of the city’s many museums. You could happily cap off each day by nibbling on forkfuls of paella while sipping Spanish rioja.

Rome wasn't built in a day--and you'll need much more than a day to take in this timeless city. The city is a real-life collage of piazzas, open-air markets, and astonishing historic sites. Toss a coin into the Trevi Fountain, contemplate the Colosseum and the Pantheon, and sample a perfect espresso or gelato before spending an afternoon shopping at the Campo de’Fiori or Via Veneto. Enjoy some of the most memorable meals of your life here, too, from fresh pasta to succulent fried artichokes or a tender oxtail stew.

The museums of Lisbon celebrate the rich history and culture of this Portuguese capital city. The Maritime Museum is perfect for kids (and grown-ups!) who adore all things nautical, while the Casa-Museu Dr. Anastácio Gonçalves is a hidden gem of colorful artwork. To fully appreciate the city’s dramatic stone architecture you can take a guided walking tour, or customize your own tour, making sure to visit the Padrao dos Descobrimentos, the Mosteiro dos Jeronimos, and the UNESCO World Heritage site the Torre de Belem.

The shining jewel of Qatar, Doha is a multicultural city, home to most of the country's population as well as expatriate communities from a range of origins. Shopping abounds in the city's plentiful malls, while the Corniche impresses visitors with picturesque architecture and dazzling views of the harbor. Doha boasts myriad cultural facilities, including the futuristic Education City and the National Museum.

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.

Conquering New York in one visit is impossible. Instead, hit the must-sees – the Empire State Building, the Statue of Liberty, Central Park, the Metropolitan Museum of Art – and then explore off the beaten path with visits to The Cloisters or one of the city’s libraries. Indulge in the bohemian shops of the West Village or the fine dining of the Upper West Side. The bustling marketplace inside of Grand Central Station gives you a literal taste of the best the city has to offer.